Gwynedd on Wikipedia.

Aber (south of Trawsfynydd), the former chapel (according to this old map), or Sunday School (according to Coflein, which refers to a building date of 1905, with conversion to residential use before 1998). Another view. SH 7087 3240. Both © Howard Richter (2016).
Aberdaron, St. Hywyn (CiW). Another view, showing the church's spectacular situation. SH 173 264. © David Wilkinson. Another view, two interiors - 1, 2, the pulpit, altar, and the font. Link. Grade I listed. The former Salem Chapel (1898), now in residential use. SH 174 266. All © Dennis Harper (2013).
Aberdovey - see Aberdyfi, below.
Aberdyfi, St. Peter. © Chris Emms (2010). Another view, © Paul Wood (2015). Bethel Wesleyan Methodist Chapel on Church Street, is a re-build of 1868 on the site of a predecessor of 1829. SN 6143 9604. © Paul Wood (2015). Coflein entry. The former Congregational Church on Sea View Terrace. Originally built in 1845, the present building is of a re-build of 1880. SN 6141 9595. © Paul Wood (2015). An old postcard view, the card franked in 1904. From Christopher Skottowe's Collection. The Coflein entry says the church had closed by 1998.
Abererch, St. Cawrdaf. Another view. SH 396 365. Link. (The former?) Ebenezer Chapel (1868). SH 395 365. All © Dennis Harper (2013).
Abergynolwyn, St. David (1879-80). Another view and the bell-turret. Two interior views - 1, 2, and the font. SH 6766 0684. Coflein entry. There are two former chapels on Llanegryn Street - Cwrt Congregational Chapel (1878, SH 6767 0706, Coflein entry), and the Calvinistic Methodist Chapel (1806, re-built 1866, SH 6758 0713, Coflein entry). Another view. All © John Bowdler. The former Capel Saron was built as Wesleyan in 1835, re-built in 1870, and is now a B&B. SH 6779 0699. © Chris Emms (2009). The Coflein entry notes that it was closed "before 1992".
Abersoch.
Arenig. Howard Richter advises of two chapels here. The earlier was Calvinistic Methodist, and stood at SH 8334 3927. The piece of ground where it stood (the rubble patch) can be seen on a 2011 Streetview. A later chapel still stands at SH 8347 3935. Of unknown denomination, it is perhaps now in residential use. 2011 Streetview.
Arthog, St. Catherine. Interior view. SH 6456 1461. Both © Kenneth Paver. A 2016 Streetview gives another viewpoint. The Coflein entry advises that it was originally a chapel of ease to Llangelynin, and built in the early years of the 19th century. Grade II listed. Howard Richter advises of three chapels. Capel Salem (Wesleyan) stands at SH 6473 1487. The Coflein entry dates it to a re-build of 1868 of an earlier building of 1833, with closure in 1973. It appears to be derelict in a 2010 Streetview. Another Streetview. Capel Seion was Calvinistic Methodist, and Coflein provides the following dates - originally built 1806, enlarged 1839, re-built 1868 and renovated in 1898. Its appearance in a 2009 Streetview suggests that it has been converted to residential use, though in the 2016 version it looks somewhat neglected. Capel Horeb stands at SH 6327 1360. Coflein dates it to "pre-1900". A 2016 Streetview suggests another domestic conversion.

Bala.
Bangor.
Barmouth, St. John, on Celifechan Road. The grade II* listing provides dates of 1889-1895. SH 6132 1594. © Dave  Westrap. Another view, © Paul Wood (2015). Interior view, © Tim Hollinghurst, and another, © Kenneth Paver (2011). Two more views - 1, 2, and a window, all © Chris Stafford (2014).Link. Coflein entry. St. David (1830) on Church Street. SH 6153 1556. © Dave  Westrap. Another view, two of the interior - 1, 2, a window and the font, all © Chris Stafford (2014). Coflein entry. Grade II listed.
Beddgelert, St. Mary. SH 591 480. © Bill McKenzie. Another view, and a more recent one. Both © Dave  Westrap. Interior view, © Dave  Westrap. Link1. Link2. Link3.
Bethel (near Caernarfon), Addoldy'r Annibynwyr (Independent, 1866). Since Martin took his photo, the chapel has evidently gone out of use - see the photo on Geograph, dated 2011, where the building displays a "Sold" sign. SH 5240 6535. Link. Eglwys y Cysegr Bresbyteraidd (1864). SH 5305 6538. Link1. Link2. Both © Martin Briscoe.
Bethel (north-east of Bala), the derelict Bethel Independent Chapel. SH 9880 3981. © Gervase N. E. Charmley (2011). The Coflein entry gives an original building date of 1816, though the present building dates from a 1909 re-build. It had "fallen into disuse by 1993". Photos available in the Coflein entry also show that the chapel has been completely rehabilitated, and is currently in good condition, presumably as a private residence. Grade II listed.
Bethesda.
Betws Garmon, St. Garmon (aka St. Germanus), (CiW). © Bill McKenzie. Another view. © Dave  Westrap. SH 535 576. Link1. Link2.
Blaenau Ffestiniog.
Bodernabwy, Aberdaron New Church (closed). This site has a little history. Two additional views - 1, 2, and the tower stairs. SH 175 273. All © Dennis Harper (2013).
Borth y Gest, St. Cyngar. SH 565 374. Link. Ebenezer Presbyterian Church (dating from 1880). SH 563 375. Link. Both © Dave Westrap. Bethel Congregational Chapel (1867). Two further views - 1, 2. SH 5636 3746. All © Howard Richter (2013 and 2016). Link. The former Wesleyan Methodist Chapel (1880), now converted to residential use. Another view. SH 564 375. Both © Howard Richter (2016). Link.
Bontddu, Bethania Calvinistic Methodist Chapel. Another view. SH 6732 1892. Both © Howard Richter (2016). Link, from which - built 1803, re-built 1865, renovated 1893.
Borthwnog, Capel Tiberias (Independent) has a beautiful outlook. This link dates it as "before 1905"; the date-stone says 1889. Two additional views - 1, 2. SH 683 190. All © Howard Richter (2016).
Botwnnog, St. Beuno (CiW). SH 264 315. Link. Former(?) Rhydback Chapel (1889, Calvinistic Methodist). Current status not known. Another view and the date-stone. SH 262 309. All © Dennis Harper (2013).
Brithdir, St. Mark (1895-8). Now redundant, and in the care of the Friends of Friendless Churches. Interior view. SH 7635 1835. Both © John Bowdler. Another view of the interior, the font, altar and pulpit, and two of the charming wood carvings - 1, 2, all © Tim Hollinghurst (2019). Link. The grade I listing emphasizes its importance as a church in the Arts & Crafts style. Brithdir Independent Chapel (1860). Approx. SH 7682 1873. © Mike Berrell (2010). Grade II listed - it dates the chapel to 1860. The former Presbyterian Chapel, now a nursery. SH 765 186. © Mike Berrell (2010).
Bronaber, the former St. Thomas (CiW). Another view. SH 7120 3176. Both © Howard Richter (2016).
Bryn-Eden, Capel Eden (Calvinistic Methodist). According to Coflein, it was originally built in 1822, rebuilt or modified in 1900, closed in  1987, and subsequently converted for residential use. SH 7150 2933. © Howard Richter (2016).
Bryn-engan, Calvinistic Methodist chapel (1908). A stone built into one corner bears dates 1777, 1826 and 1870. SH 452 439. Two additional views - 1, 2, the latter showing the ghosts of former attached buildings. All © Howard Richter (2014). Link1. Link2.
Bryn Mawr (or Bryn-Mawr), the former Calvinistic Methodist chapel, of 1877. Another view. The building is evidently being cared for - compare for example with a Streetview from 2010 - but it hasn't obviously been converted. SH 2464 3372. Both © Martin Richter (2023). Brief Coflein entry.
Bryncir, Soar Chapel (1868). The date-stone also bears the initials T.C., which Howard advises stand for Trefnyddion Calfinaidd, or Calvinist Organisers (see here if you are a Welsh speaker). Another stone commemorates Henry Hughes, minister here and at Bryn-engan for nearly 45 years. A noted historian, you can see more about him here. SH 480 447. © Howard Richter (2016). Link.
Bryncroes, Ty Mawr (Calvinistic Methodist). The date-stone (with Biblical quotations in Welsh) for 1799. The grade II listing gives a building date of circa 1840, so the date-stone has presumably been retained from an earlier chapel on the same site. SH 228 322. Both © Howard Richter (2018). Link.
Bryncrug, Presbyterian Church, built as Calvinistic Methodist (1883). The gravestone of Mary Jones (see here for her story). The former Methodist Chapel (previously Wesleyan). Former Chapel at SH 609 031. By an examination of old maps, Howard Richter has determined that this was Capel Saron (Independent). Another view. A close-up of the stone above the door. St. Matthew no longer in use as a church). All © John Bowdler.
Brynrefail (North-West of Llanberis), the Presbyterian Chapel. SH 5599 6271. © Martin Briscoe. The 2016 Streetview shows that since Martin took his photo, the building has been converted to secular use, and was for sale at that date. Coflein entry, from which we learn that it was built as Welsh Calvinist Methodist in 1844.
Bwlch-derwin, the former Calvinistic Methodist chapel, now converted to residential use. Another view. SH 461 469. Both © Howard Richter (2014). Link. The property was for sale in 2010, so the chapel must have closed no later than this. The Estate Agents sale notice has interior photos (greyed out, unfortunately).

Cae Adda, the former Calvinistic Methodist Chapel, built 1848, rebuilt 1910. It stood originally at SH 6926 3545, but was moved to SH 6922 3522 to make way for a reservoir for the Traws nuclear power station. It's now used by South Snowdonia Search & Rescue. Two further views - 1, 2. All © Howard Richter (2016). Link.
Caerdeon, St. Philip. The reredos. SH 6512 1814. Both © Kenneth Paver (2011). The lych-gate, the pulpit, and a window, all © Chris Stafford (2014). Link. Grade I listed, wherein it's dated to 1862. The lych-gate is listed separately as grade II.
Caerhun (nr. Bangor), an unidentified chapel. © Martin Briscoe. Howard Richter has advised that this was a Calvinistic Methodist chapel, built in 1831 and re-built in 1895. It was disused by 2005, by which time a planning application had been lodged to convert to residential use. The application can be seen here. A drawing therein shows a plan of the chapel. SH 5735 6905. Link. Grade II listed.
Caernarfon.
Cefn-Ddwysarn, Chapel (Welsh Calvinistic Methodist). SH 965 384. © Peter Morgan (2013). Grade II listed.
Ceidio Fawr, St. Ceidio (CiW). Interior view. SH 287 381. Both © Dave  Westrap. Link.
Chwilog, Capel Siloh (Congregational). The dates on the chapel are 1869 and 1897, which agrees with the dates given in the grade II listing. However, Coflein says that it was built in 1835, re-built in 1869, and with further works of enlargement and alteration in 1877 and 1897. SH 4329 3843. Capel Uchaf (Calvinisitic Methodist, 1882). SH 4313 3847. Link. Both © Howard Richter (2016).
Clynnog Fawr, St. Beuno (CiW). Another view, and the interior. SH 4144 4970. All © Dave  Westrap. Two more views - 1, 2, both © Janet Gimber (2023). Link1. Link2. Coflein. Grade I listed. For related listed features, see here. A Calvinistic Methodist Chapel (2021 Streetview) shows on old maps at SH 4169 4981. It has a date-stone which calls it Ebenezer, with the dates 1843-1907, presumably its date of first building, and then re-build or significant alterations. Coflein. Grade II listed.
Corris, Holy Trinity on Bridge Street. SH 754 077. © Bill McKenzie. Another view, © Richard Roberts (2015).
Criccieth.
Croesor, Calvinistic Methodist Chapel (1863, and enlarged only three years later). Two additional views - 1, 2. SH 6304 4473. All © Howard Richter (2016). Link.
Cwm Fynfal (near Ffestiniog), the former Capel Babell (1904), now converted to residential use. SH 718 412. © Martin Richter (2014). It was preceded by a smaller Calvinistic Methodist Chapel of 1861 at circa SH 7207 4115. The overgrown site, is shown here (external website), on the left-hand side of the road. More details (and photos of masonry) here.
Cwm Pennant, St. Michael (CiW). Two additional views - 1, 2. SH 5271 4486. © Howard Richter (2013). Link (has interior views). Capel Pennant (1870, Calvinistic Methodist). It was for sale in 2012. Two additional views - 1, 2. SH 531 454. Link. All © Howard Richter (2012).
Cwm Prysor, Capel Cwm Prysor (Calvinistic Methodist, 1900). Two additional views - 1, 2. SH 737 362. Link. All © Howard Richter (2012).
Cwmstradllyn, the former Capel Saron (Calvinistic Methodist, 1888). Two additional views - 1, 2. SH 554 442. All © Howard Richter (2012). Link.

Deiniolen.
Dolbenmaen, St. Mary (CiW). Two further views - 1, 2, and the churchyard entrance. SH 5067 4315. All © Howard Richter (2012). Link. Grade II* listed.
Dolgellau, St. Mary. SH 7275 1784. From an old postcard in Steve Bulman's Collection. A modern view, © Stuart Mackrell, and an interior, © Tim Hollinghurst (2019). Coflein entry. Grade II listed.
Dolhendre, Capel Carmel (Independent, 1833, re-built 1893). SH 8494 3148. © Peter Morgan (2014). Coflein entry. Capel Dolhendre stands about a quarter of a mile away at SH 8522 3091. It can be seen here in a 2011 Streetview, and the 1912 date-stone here. The Coflein entry provides dates of 1841 for building, with a re-building in 1912. It also says that it had been converted to residential use "by 1998", which is true, but in fact the conversion process had began decades earlier (no later than 1969), as can be seen here.

Efailnewydd, Capel Berea (Calvinistic Methodist). Two additional views - 1, 2. SH 3506 3602. All © Howard Richter (2016). Link.

Four Crosses, Ebenezer Calvinistic Methodist Chapel. Originally built as the Sunday School, sometime between 1901 and 1917, the congregation transferred here when the neighbouring chapel was demolished. The original chapel stood at the right of the school (as seen in the photo in this entry), and was still standing when the 1980-93 OS map was compiled. Originally built in 1815, re-built and enlarged in 1862, it was demolished in the 1990's, according to RCAHMW. A photo of the chapel is available here. (This photo, © Howard Richter (2016) was taken from about the same viewpoint as the chapel photo). SH 3978 3908. © Martin Richter (2011). The former Capel Salem (Independent, 1863), for sale in 2016. Another view. SH 3987 3908. Both © Howard Richter (2016). Link.

Ganllwyd, Capel Libanus (Independent). Another apparent case of a conflict between Coflein, which says it was a conversion from a factory before 1851, and the date-stone of 1857. Perhaps the date-stone refers to a complete re-build? Another view. SH 727 244. The former tin tabernacle Mission Hall, now in use as the village hall. SH 7265 2430. All © Howard Richter (2016).
Garndolbenmaen, Capel Horeb Particular Baptist Chapel (1866). Another view. SH 497 442. Link. Capel Jerwsalem Calvinistic Methodist Chapel bears dates 1780, 1873 and 1915. Another view. SH 496 437. Link1. Link2. All © Howard Richter (2012).
Garreg, St. Catherine (CiW). Another view. SH 612 417. Both © Howard Richter (2012). Link.
Gellilydan, Capel Utica (Independent), which was built in 1843, and re-built in 1897, for which there is a date-stone. Two additional views - 1, 2. SH 6954 3904. Link. Maentwrog Uchaf (Calvinistic Methodist) dates from a re-build of 1895. Two additional views - 1, 2. SH 6845 3980. Link. Holy Cross (R.C., opened 1952). SH 687 399. All © Howard Richter (2013).
Glan-yr-Afon (north of Bala), the Calvinistic Methodist Cwmtirmynach Chapel (1826, re-built in 1880). SH 9103 4095. © Gervase N. E. Charmley (2011). Coflein entry.
Glan-yr-Afon (West of Corwen), St. James the Greater. Built 1861-4 to a design by Sir George Gilbert Scott. Another view. SJ 027 425. Both © Peter Morgan (2012). Link. Grade II listed. Llawrbettws Chapel (Calvinistic Methodist). The date-stone has dates 1803 (built), 1835 (enlarged) and 1865 (re-built). It was also further altered in 1890. SJ 024 425. © Peter Morgan (2012). Another view, and an interior view, both © Gervase N. E. Charmley (2011). Link. Grade II listed.
Golan, Capel Bethel (1891, Calvinistic Methodist). Another view. SH 533 416. Link1. Link2. The former Capel Golen (Calvinistic Methodist), much remodelled at the time of conversion to residential use. SH 532 416. Link. All © Howard Richter (2012). Capel Ainon Baptist (1862). Three further views - 1, 2, 3. SH 525 426. All © Howard Richter (2013). Link.
Groeslon (near Waunfawr), the former Calvinistic Methodist Chapel. SH 5273 6016. © Martin Richter (2022). Coflein entry, where it's curiously described as a former Sunday School (it's clearly shown as a chapel on O.S. maps). It dates it to the late 19th century, with conversion in the late 20th. Capel Moriah used to stand a short walk away at SH 5280 6007. This source calls it Moreia Independent Chapel, and dates it to 1829, re-built 1865, and demolished in the 1880's. The latter must surely be a typo for the 1980's, or something similar, as it still shows on mid-20th century O.S. maps.

Harlech.

Idwal, the former Mission Room. Built sometime between 1889 and 1900 (from map evidence), it also served as a school-room. It closed between 1953/4 and 1963/4, and by 1970 had been converted into a youth hostel. SH 648 604. © Martin Richter (2011). Link.

Jerusalem (near Trawsfynydd), Jerusalem Independent Chapel. SH 7142 3006. Coflein says it was built in 1826, and rebuilt in 1893. The date-stone still proclaims "1826". Both © Howard Richter (2016). Link.

Llan Ffestiniog.
Llanarmon, St. Garmon (CiW). Four additional views - 1, 2, 3, 4, and the interior. SH 4230 3935. All © Howard Richter (2013). Link.
Llanbedrog, St. Pedrog. An interior view, and a rather lovely window. SH 3295 3155. All © Tim Hollinghurst (2019). Coflein entry. Grade II* listed. Howard Richter advises of three chapels nearby - the first is the Calvinistic Methodist Capel Peniel at SH 3217 3190. It can be seen on a 2016 Streetview here. The Coflein entry tells us that it was perhaps originally built in 1791, and re-built in 1866. Grade II listed. The second is the Wesleyan Methodist Rehoboth at SH 3221 3189. The Coflein entry gives dates of 1816, with re-builds or modifications in 1833, 1839 and 1871. Not visited by Streetview, other sources confirm that the building is still extant. Seion Independent Chapel stands at SH 3237 3195, and was seen by Streetview in 2009 and 2016, between which dates the building had been re-painted. The Coflein entry gives a building date of 1883.
Llanberis, St. Padarn. SH 5787 5997. © Bill McKenzie. Link. Coflein entry. Grade II* listed. St. John Jones (R.C.) on High Street. SH 5772 6044. © Dave Westrap.
Llanddeiniolen, the chapel in St. Deiniol Cemetery. SH 545 659. © Dave Westrap. Link1. Link2.
Llandderfel, St. Derfel (CiW). Another view. SH 9816 3796. . The grade I listing advises of its foundation in the 6th century, with the present church probably dating from the early 16th. Capel Saron (Calvinistic Methodist). The Coflein entry supplies a date of 1814, re-built in 1888. SH 9821 3696. Grade II listed. All © Peter Morgan (2012). Howard Richter advises of another chapel nearby, at SH 9844 3709 - Capel Rama (Independent). Coflein dates it to 1829, re-built in 1868, and disused by 1997. It can be seen here in a 2010 Streetview.
Llandecwyn, Llandecwyn Church. Two further views - 1, 2. SH 633 376. All © Gordon Reed.
Llandwrog, St. Twrog (Anglican). SH 451 560. © Dave Westrap. An old postcard view, from Reg Dosell's Collection. Link.
Llandygai, St. Tegai. SH 600 710. © Tim Hollinghurst. The Coflein entry has numerous photos. Grade II* listing, which advises that there is fabric of the fourteenth and sixteenth centuries, and a restoration in 1853.
Llanelltyd, St. Illtyd (CiW). Three additional views - 1, 2, 3. SH 7175 1955. Link. Grade II* listed. The former Capel Peniel (Calvinistic Methodist), now residential. Coflein gives dates of 1836, with a re-build in 1870, and closure in 1992, which is at odds with the sign attached to the premises, which proclaims 1817. Another view. SH 7145 1948. All © Howard Richter (2016).
Llanengan, St. Engan. SH 294 270. © Martin Briscoe. Coflein entry, which mentions that the church is largely from a 1520-1534 remodelling of a C13 building, and that two screens of circa 1530 are "outstanding". Grade I listed.
Llanfachreth, St. Machreth (CiW). Another view, and the porch. SH 754 224. Link. Grade II listing which says that the medieval church was re-built in the early C19, and again (except for the tower) in 1872. Capel Bethel (Calvinistic Methodist). Two additional views - 1, 2. SH 754 224. Link. Capel Siloh Independent Chapel (1875) at SH 747 227. Another view. Link. All © Howard Richter (2012).
Llanfaglan, St. Baglan (CiW) - in the care of the Friends of Friendless Churches - only holds the occasional service. Two further views - 1, 2. SH 455 606. All © Dave  Westrap. Link1. Link2. Link3.
Llanfair-is-gaer, St. Mary. SH 502 660. © Jill Couthard. Coflein entry. Grade II listing, which says that it is medieval, with much C13 fabric, and that it was originally attached to Bedgellert Priory.
Llanfihangel-y-Pennant, St. Michael. Its lovely, simple interior. SH 671 089. Both © John Bowdler. Link. Howard Richter has advised that there was a Capel Sardis nearby at about SH 673 089. Built in 1820, and now ruinous, some photos are available here. Its licence for marriages was cancelled in 2000, so it was out of use before this date. Can you advise if it still exists?
Llanfor, the redundant St. Mor & St. Deiniol (CiW), for sale in 2012. SH 938 367. © Peter Morgan (2012). The Grade II listing dates the present church to 1874, replacing a medieval predecessor. The church is supposed to be of 5th century foundation. Coflein entry.
Llanfrothen, St. Brothen (or St. Frothen). Now under the care of the Friends of Friendless Churches, it is Grade I listed. Another view, and an interior view. All © Iain Taylor. Two additional views - 1, 2, the porch, and the interior, all © Howard Richter (2012). Link1. Link2. Link3. Capel Siloam (Calvinistic Methodist). SH 622 417. © Howard Richter (2012). Link.
Llangelynin, St. Celynin. Another view, and the interior. An unusual survival is a set of pews with the names of their occupants inscribed on the back rails. SH 571 072. All © Tim Hollinghurst (2019). Coflein entry. Grade I listed.
Llangian, St. Cian. Another view, and two interiors - 1, 2, and the font, dated 1638. SH 297 291. Link. Smyrna Calvinistic Methodist Chapel (1878) - not known if still active. SH 296 289. All © Dennis Harper (2013).
Llangower, St. Cywair or St. Gwyr. SH 904 323. © Eirian Evans. Grade II listed. Capel Glyn. SH 912 315. © John Bowdler (1992). It is marked on older maps as a church (at least as recently as 1979), but no longer, and has presumably been converted to residential use. Link.
Llangybi, St. Cybi (CiW), which has medieval and 15th century work. Two further views - 1, 2. SH 4286 4117. Link. Capel Helyg (Independent). The Coflein entry (and date-stone) say that it was first built in 1652, restored in 1814, and twice re-built in the 19th century, the latest in 1877. Another view. SH 4247 4096. All © Howard Richter (2013).
Llanllechid, Eglwys Santes Llechid. SH 622 687. © Martin Briscoe. Grade II listed - which gives a date of 1844. It replaced a medieval church on another part of the churchyard. Coflein entry.
Llanllyfni, St. Rhedwi, which, although restored in Victorian times, retains much fabric of the 14th and 15th centuries. SH 4805 5182. © Martin Briscoe. Three further views - 1, 2, 3, all © Howard Richter (2016). Grade II* listed. The site of the demolished Ty'Lon Scotch Baptist Chapel. Built in 1790, it played a key part in the history of the Scotch Baptist movement, as this website explains. SH 4697 5175. © Howard Richter (2016). Capel Ebenezer (Welsh Baptist). Built in 1826, it was altered in 1858 and enlarged in 1870, according to the Coflein entry. SH 4715 5231. © Howard Richter (2016). The derelict Capel Salem, built as Capel Moriah, and which opened in 1871. At one time, there were two chapels - Salem (Calvinistic Methodist) and Moriah (Congregational). Some time after Moriah closed, Salem was also closed (and subsequently demolished), and the congregation moved into Moriah and re-named it Salem. Two additional views - 1, 2. SH 4697 5175. All © Howard Richter (2016). The site of the demolished Capel Salem (Calvinistic Methodist, 1889). A photo is available here. SH 4702 5182. © Howard Richter (2016).
Llannor, Church in Wales. SH 353 372. © Dave Westrap. Four additional views - 1, 2, 3, 4, and a handsome inscribed stone commemorating a former vicar, all © Howard Richter (2016).Link1. Link2. Grade II* listing, which mentions a C6 Christian inscribed stone. Capel Bethania (Calvinistic Methodist, 1867, re-built 1899) appears to be disused. Another view, and two interiors - 1, 2, taken through windows. SH 3545 3747. All © Howard Richter (2016). Link.
Llanrug, the former Capel Llanrug, now owned by a business. Perhaps the fourth chapel on the site, as a plaque lists the dates 1798, 1822, 1842 and 1867. SH 5347 6349. © Dave Westrap. Link. Bryngwyn Congregational Chapel on Ffordd Bryngwyn. SH 5409 6314. © Janet Gimber (2015). The Coflein entry supplies dates for building in 1837, with a re-build in 1870, and includes several photos, including one of the interior. The Calvinistic Methodist Chapel at Tan-y-Coed. SH 5375 6255. © Bill McKenzie. The Coflein entry ascribes a date of 1890, with a re-building only 11 years later, but Howard Richter suspects from map evidence that the 1890 date refers to the adjacent and original chapel (not visible in Bill's photo, but there are photos of it on Coflein - "Old Chapel"), 1901 being the date of the present chapel. Grade II listed. The main Presbyterian Chapel in the area is Capel y Rhos, which stands at SH 543 636. It can be seen on Streetview here. Link1. Link2. Coflein dates it to "before 1912". The former Capel Ceunant (Calvinistic Methodist), at SH 5317 6129. Now in residential use, it has a date-stone for 1887. It's Coflein entry says it has a predecessor of 1837 on the same site. © Martin Richter (2022).
Llanuwchllyn, St. Deiniol. SH 874 303. © Eirian Evans. The grade II* listing says that it dates from 1873, its medieval predecessor having been demolished the previous year. Coflein entry. Ainon Baptist Chapel (1840 - date-stone). SH 8700 2977. Both © Peter Morgan (2014). The Coflein entry dates it to 1840, with "modifications" in 1887. Grade II* listing. Hen Gapel, at Werglodd. Notice - which Howard Richter advises refers to temporary closure of the building for refurbishment works. SH 8685 3103. Both © Peter Morgan (2012). Coflein entry. Grade II listing, which provides a date of 1871, for this, the third chapel on the site. The attached manse (seen here on a 2011 Streetview) is also listed, as grade II. Howard Richter advises of three other chapels, two converted to other uses, and one demolished. Capel Glanaber (Calvinistic Methodist) stood at SH 8749 3017. A 2016 Streetview of the site can be seen here, and the Coflein entry here, which dates it to 1872. Its date-stone, presumably rescued from the demolition, has been built into a wall (seen here on Streetview) - note the spelling "Glan Aber". Y Pandy Chapel was Calvinistic Methodist, and has been converted to residential use. SH 8777 2995. The Coflein entry (which has a good selection of photographs) dates it to 1805, with an enlargement in 1930, and conversion "by 1995". The burial grounds survives, and has grade II listings for the entrance gateway, and the grave of Sir Owen Morgan Edwards. Ysgoldy Independent Chapel (Streetview) stands at SH 8768 3002. The Coflein entry dates it to circa 1900, advises that it was still active in 1997, and that it had been converted to a children's activity centre by 2003.
Llanycil, St. Beuno. SH 915 349. © Eirian Evans. As the grade II listing explains, the building (which incorporates parts of the medieval church) dates from 1881. Coflein entry.
Llanystumdwy, St. John the Baptist. © Bill McKenzie. Moriah Calvinistic Methodist Chapel. The present building dates from 1936 (to a design by Sir Clough Williams-Ellis) replacing an earlier one of 1866 on a different site (at SH 4744 3852), and which had been destroyed by a fire in 1936. Two further views - 1, 2. SH 4749 3743. All © Howard Richter (2016). Link. Grade II* listed. The 1886 chapel can be seen on this old photo, at the extreme right. Planning permission for building a house on the site was granted in 2000, and the house can be seen here, in a Google Maps view of 2011. Another chapel stood at SH 4528 3808, west of the town. Coflein gives it a building date of 1804, with a re-build in 1868, and conversion to residential use in the early 20th century. It's now known as Hen-Gapel.
Llwyndyrys, Capel Llwyndyrus (Calvinistic Methodist), a 1902 re-building of an 1836 chapel. Interior view. SH 3748 4096. Both © Howard Richter (2016). Link.

Maentwrog.
Mallwyd, St. Tydecho. Another view, and the porch, which has the unusual decoration of a whale bone. The interior is memorable too, with the rear seating being steeply banked. Another view of the interior, and a window. SH 8629 1236. All © Tim Hollinghurst (2019). Coflein entry. Grade II* listed.
Minffordd, the site of Capel Minford. The house at left stands on the site of the chapel, the other building was the Infant School, also shown here. The chapel was built before 1889, when it shows on the map of that year. The school had been built by 1901, although its original use may not have been as a school, as a recent planning application described it as a "Former Chapel Vestry". The congregation merged with Capel Y Porth in Portmadog in 2009. SH 585 384. Both © Martin Richter (2014).
Morfa Bychan, Capel Siloam Independent Chapel is a rebuild of 1902 on the site of an earlier one of 1856. SH 5513 3729. Link. The former Nasareth Calvinistic Methodist Chapel (1856) on Beach Road. Another view. SH 5455 3740. Link. All © Howard Richter (2013).
Morfa Nefyn, St. Mary (CiW, circa 1870). Two extra views - 1, 2. SH 2880 4005. Link. Capel Moreia (Calvinistic Methodist). Originally dating from 1825, it was twice re-built, in 1853 and 1882. Another view. SH 2890 4016. Link. Grade II listed. Resurrection of Our Saviour (R.C., 1968). Another view. SH 2880 4009. All © Howard Richter (2016). There are at least two further chapels in the village - Tabernacl (Congregational, 1862) at SH 2859 4027 (link, with photos), and Caersalem (Baptist) at SH 2868 4025 (link, which gives dates of 1854, and says it was disused by 1999).
Mynydd Nefyn, the former Capel Pisgah (Calvinistic Methodist, 1848), now converted to residential use. Another view. SH 3222 3957. Both © Howard Richter (2016). Link.

Nant Peris, St. Peris, which can be seen in several photographs on the Coflein entry. SH 6055 5830. Grade II* listing, which advises of 14th, 15th, and 16th century fabric. Capel Rehoboth (Calvinistic Methodist, later Welsh Presbyterian). SH 6055 5844. © Bill McKenzie. Some additional photos are available here. Coflein entry. Grade II listing, which dates it to 1833, with a re-building in 1876.
Nantmor, Peniel (Calvinistic Methodist). Another view. Link, which advises that it was built in 1829, re-built in 1868 (and for which there is a date-stone), and converted to residential use by 1998. SH 6010 4604. The former Cedron Independent Chapel, which dates from 1908, and was disused by 2002 (see this link). SH 6009 4608. All © Howard Richter (2016).
Nefyn, St. David (Dewi Sant). SH 306 415. Link1. Link2. The former St. Mary now serves as a Maritime Museum. SH 308 406. Link1. Link2. Soar Independent Church. SH 306 405. All © Dave Westrap. The derelict Capel Seion (Baptist, 1800, re-built 1851 and 1904). Two further views - 1, 2. SH 3084 4042. All © Howard Richter (2016). Link. There is another chapel in the village (Isaf, Calvinistic Methodist, 1785, latest re-build 1876) at SH 3075 4042. Link, with photos.

Pant Glas (or Pantglas, Pant-Glas, or Pant-Glās), Libanus Chapel, (Calvinistic Methodist, 1868 - date-stone). There is another date-stone above the door. Two additional views - 1, 2. SH 472 473. All © Howard Richter (2014). Link.
Parc, Welsh Calvinistic Methodist Chapel. Originally built in 1810, it was (according to this link), re-built and/or modified in 1852 and 1875. SH 876 339. © Peter Morgan (2013).
Pen-y-Groes.
Penbryn, the site of the demolished Capel Pencoed (Calvinistic Methodist). SH 4406 4088. © Howard Richter (2013). Link.
Pencaenewydd, Calvinistic Methodist Chapel. According to the Coflein entry, it was built in 1807, re-built in 1823, and again in circa 1880. If the latter date is correct, then the date-stone from the previous re-build was retained, as it is still visible (although for 1822). SH 4075 4100. Both © Howard Richter (2013).
Penmorfa, St. Beuno (CiW). Two additional views - 1, 2. SH 541 403. Link. Grade II* listing, from which we learn that it has 14th century nave and 15th century chancel. The former Capel Carizim (Calvinistic Methodist, 1868), now in residential use. Another view. SH 547 406. Link. Capel Zion (Independent, 1868). Another view. SH 5485 4065. Link. All © Howard Richter (2012).
Pennal, St. Peter ad Vincula. Rebuilt in 1769, much of the fabric from its medieval predecessor was re-used. The porch, and two interior views - 1, 2. SH 700 004. All © John Bowdler. Another view, and interior view, both © Rosemary Groves (2011). Link. Coflein entry. Grade II listed. The former Carmel Welsh Independent Chapel (1816, re-built 1871), © John Bowdler. Another view, © Chris Emms (2009). The Coflein entry includes some photos. Grade II listed. Calvinistic Methodist Chapel (1820, re-built 1869, repaired 1908, for sale 2009). © John Bowdler. Another view, © Chris Emms (2009). Coflein entry. Grade II listed. There was also a Wesleyan Methodist Chapel. It stands (or stood) at SH 7009 0037. Built in 1809, it was re-built twice, in 1850 and 1899 (according to the Coflein entry).
Penrhos-garnedd, Kingdom Hall of Jehovah's Witnesses. Maps suggest a post-1990 date. SH 5610 7063. Coflein entry. Eglwys St. Pedr (1956). SH 554 701. Coflein entry. The former Capel y Graig (1814, re-built in 1872). Janet Gimber has advised that this was Calvinistic Methodist, and has been converted to secular use. SH 5531 7012. Coflein entry. All © Martin Briscoe. There is another former chapel at SH 5597 7051 - Capel Beula (Independent). Originally built in 1836, the present building is of a re-build of 1872. It can be seen on a 2009 Streetview. Coflein entry.
Penrhyndeudraeth.
Pentir, St. Cedol (1848). SH 573 671. © Martin Briscoe. Coflein entry, which says that it replaced an earlier church nearby. Grade II listed.
Pentre Uchaf, the former Pentre Uchaf Methodist Chapel (1896). The appended link says that it was still active in 2010, but was undergoing conversion for residential use in 2012. As Howard's photos show, the work was still incomplete in 2016. Two additional views - 1, 2. SH 3560 3903. © Howard Richter (2016). Link.
Pentrefelin, the Parish Hall, which was originally built as a church, sited to be more convenient for the villagers, as the parish church (St. Cynhaearn) was some distance away. Dating from the 1930's, it was designed by Clough Williams-Ellis, most famous as the designer of Portmeirion, the setting for the cult TV series, The Prisoner. Another view, and the interior. SH 528 398. Link. An old postcard view is available here, and an old photo here. Grade II listed. The old church, St. Cynhaearn (K), is now in the care of the Friends of Friendless Churches; some services are still held here. Some of the fabric in the nave is supposed to be of the 12th century, with the transepts added in the 15th and 16th centuries. Another view. SH 526 388. Link. Grade II* listed. The site of the demolished Capel Tabor (Congregational). The gateway to the site appears to be original. SH 5226 3997. Link. Flickr has some old photos - 1, 2, 3. All © Howard Richter (2012). The former Capel Cedron (1867, Calvinistic Methodist), now in residential use. Another view. SH 5249 3964. Both © Howard Richter (2016). Link.
Pistyll, St. Bueno, and its rush-strewn interior. SH 3282 4232. Both © Janet Gimber (2023). Link. Grade I listed. The former Bethania Calvinistic Methodist Chapel (1875), as seen by Streetview in 2009. Another Streetview, from 2010. A Streetview from 2009 shows a memorial, better seen here, to Reverend Tom Nefyn Williams, more on whom here. SH 3263  4198. Coflein entry. News stories from before and after its auctioning.
Pont Rhyd-sarn, Peniel Chapel (Independent, 1895). There was an earlier Independent Chapel nearby, at about SH 8585 2864. Demolished (after 1901, but when?), there should be photos of it "out there" somewhere. SH 8595 2875. © Peter Morgan (2014).
Porthmadog.
Prenteg, St. John (CiW). Another view. SH 585 414. Both © Howard Richter (2012). Capel Bethlehem (Calvinistic Methodist). SH 588 415. © Howard Richter (2012). Another view, © Howard Richter (2016). Link. The former Horeb Chapel (Calvinistic Methodist). It was originally built in 1746, but has been much altered since then, and is now in residential use. Another view. SH 5766 4168. Link. Both © Howard Richter (2016).
Pwllheli.

Rachub.
Rhiw, the former St Aelrhiw (2010 Streetview), which stands about ¾ of a mile to the N.E. of the village centre. This source (which includes exterior and interior photos) dates it "probably .. the 18th century" on earlier footings. It has a curious footprint, the transepts being larger than the nave and chancel. Another page on the same website has "erected on old foundations in 1860". The caption of a Geograph photo from 2007 describes the church as "unused", and it's now used as a holiday let. Another Streetview, also from 2010. SH 2340 2863. Nebo Chapel. Another view. The date-stone bears dates of 1813, 1856 and 1876. SH 2272 2774. All © Dennis Harper (2013). Link. Grade II listed. An O.S. map of 1901 shows Capel Tan-y-foel (Calv. Meth.) at SH 2258 3277. No longer active, and presumably converted, it was seen by Streetview in 2016. The former Capel Pisgah (Wesleyan Methodist) stands a little way west of the village, at SH 2221 2786. Unfortunately I can't read the date-stone on Streetview, but the caption to its Geograph photo dates it to 1878. It also says that occasional services are still held. These must have now ceased as the chapel was being offered for sale in this 2018 notice. It was seen by Streetview in 2010.
Rhiw Goch, Capel Pen-y-stryd (Independent), later known as Capel Cefn Lloyd. Coflein advises that it was built in 1789, and rebuilt in 1890. Another view, and the interior. SH 7270 3150. All © Howard Richter (2016).
Rhos-fawr, Capel Soar (Calvinistic Methodist). The date stone says "A.D.1871.96", and Coflein says it was built in 1870, so 1871 was presumably the date of opening. The "96" probably means 1896, and must refer to an enlargement, refurbishment or re-build at that date. Another view. SH 3715 3949. Link. Capel Penuel (Particular Baptist). The chapel carries three dates - 1794, 1839, and 1896, the latter for the latest re-build. Two further views - 1, 2. SH 3883 3906. Link. All © Howard Richter (2016).
Rhoshirwaun, Saron Chapel (1903). SH 196 293. Bethesda Baptist Chapel (1904 - date-stone). SH 197 296. All © Dennis Harper (2013).
Rhoslan, Capel Rhos-lan (Independent) dates from 1808, with a re-build in 1834, and additional modifications in 1877. Another view. SH 480 413. Both © Howard Richter (2013). Link. Capel-y-Beirdd General Baptist Chapel (1822, re-built 1873). SH 470 416. © Bill McKenzie. Two further view - 1, 2, both © Howard Richter (2013). Link.
Rhos-y-gwaliau, former church (CiW, Holy Trinity, both confirmed by Howard Richter). Another view. SH 944 345. The former Calvinistic Methodist Chapel (1881), which Howard advises is shown on the 1901 OS map as Capel Rhosgwaliau. SH 943 347. All © Peter Morgan (2012).
Rhyd, the former Calvinistic Methodist Chapel, as seen by the Streetview van in 2011. Its Coflein entry describes it as having been built as Rhyd Methodist Sunday School, in 1872. The 6" O.S. map of 1901 labels it as Capel Rhŷd. It closed circa 1960. The present building stands on the same footprint, and Coflein says that it is the converted chapel rather than a new-build. SH 6380 4195.

Sarn Meyllteyrn, Salem Chapel (Calvinistic Methodist, 1879). Another view. SH 238 322. Link. Grade II listed. The remains of St. Pedr (CiW). Built in 1846 on the site of an earlier church, it was reduced to its present state in the 1990's. Three additional views - 1, 2, 3. An old photo of the intact church is available here and a more distant view here. SH 237 328. The Coflein entry refers to it as St. Peter ad Vincula, and mentions a standing stone in the churchyard - probably the stone visible in Howard's additional view no. 1. All © Howard Richter (2018).

Tal-y-bont (near Bala), Methodist Church (1870). SH 900 378. © Peter Morgan (2014).
Tal-y-bont (near Bangor), St. Cross (1892). Interior view. SH 609 708. Both © Tim Hollinghurst. Link1. Link2. Grade II listed. Bethlehem Chapel - this is an 1860 re-build of an 1825 chapel. SH 605 705. © Dave Westrap. Link.
Tal-y-Llyn, St. Mary. SH 7105 0940. © John Bowdler. Coflein entry. Grade II* listed.
Tan-Lan, the former Ramoth Baptist Chapel (1904), converted to residential use by 2003. There had been an earlier chapel of 1787 (Coflein here for the previous chapel). Two additional views - 1, 2. SH 6187 4257. Link. Within this graveyard is the site of the demolished Scotch Baptist Chapel. According to Coflein, it pre-dates the 1891 O.S. map, and was demolished before 2001. The churchyard gate. SH 6194 4267. All © Howard Richter (2016).
Tan-y-Grisiau, Capel Carmel (Independent) - taken from the Ffestiniog Railway. Perhaps no longer in use? SH 687 450. © Martin Richter (2011). Another view, © Martin Richter (2014), and another, © Howard Richter (2016). Link, according to which the chapel was built in 1835, then re-built in 1862, with a porch and Sunday school added circa 1870. The former Capel Moriah (1879) at SH 685 451. It shows as Baptist Chapel (General) on a map of 1888-9. The 1901 shows it as Capel Moriah (Baptist). Date of closure is also uncertain, though it appears to have been defunct before 2002, when a planning application has it as residential at that time. Another view. Both © Martin Richter (2014). Link. The site of the demolished Bethel Calvinistic Methodist Chapel. The gate pillars are still in situ. Another view. Old photos of it are available here and here - in the latter distant view, the chapel is about 2/3 of the way along, and 1/3 up, and the building is taller than its neighbours, with a hipped roof. Built in 1833, it was re-built twice, in 1840 and 1864. SH 6876 4509. Both © Howard Richter (2016). Link. Old maps also reveal evidence of vanished chapels, as follows - a Wesleyan Chapel at SH 68862 45182, which Coflein names as Shiloh, built 1830. The site is now occupied by housing. It was replaced by Capel Gorphwysa (1896) at SH 58975 45226. This too has been demolished. Coflein. St. John's Mission Room stood at SH 6890 4527. Coflein.
Trawsfynydd.
Treflys, St. Michael (CiW). Three additional views - 1, 2, 3. SH 535 378. All © Howard Richter (2012). Link. Grade II listed, from which we learn that the church is (probably) mainly C14, with a major restoration in the late 1880's.
Tremadog, the former St. Mary (1811-1995), now in use as offices. SH 562 401. © Bill McKenzie. Another view, © Howard Richter (2016). Link. Grade II* listed. Capel Peniel (1810, Calvinistic Methodist). Another view. SH 563 399. Both © Howard Richter (2012). Link1, which says the congregation meet in the village hall. Link2. Grade I listed which gives the building dates as 1808-9. A BBC article, with photo. A Roman Catholic congregation met in a dwelling called Ty Pab prior to the opening of the Catholic church in Porthmadog in 1933. The Catholic community in Tremadog goes back at least as far as 1895 - see this source. SH 5619 4011. © Howard Richter (2016). Link.
Tywyn.

Waunfawr, St. John the Evangelist (1880). SH 525 592. © Bill McKenzie. Link, which says that the interior (which is "inaccessible and disused"), is one of the architect's "dreariest". The architect was one Henry Kennedy.
Wern, the site of the former Capel Bryn-Melyn (1802, Calvinistic Methodist). A house has been built on the site, though not on exactly the same footprint. Photos of the chapel are available here, and here, the latter during demolition. The planning permission documentation includes a plan of the chapel. SH 5415 3925. © Howard Richter (2016). Link.

Y Felinheli, St. Mary. SH 518 668. © Dave Westrap. Link1. Link2.
Ystolhelyg Bach, the former Horeb Chapel (1901) at SH 158 264. Capel Uwchmynydd (1904). SH 155 264. Both © Dennis Harper (2013).