Treherbert on Wikipedia.

David Bolton has advised that this chapel, previously listed as Bethel Baptist Church (1873) was actually Bethany, and is now closed. © Gervase N. E. Charmley.

Blaen Y Cwm Baptist Church (1870). Another view.  Both © Gervase N. E. Charmley.

Carmel Independent Church. © Gervase N. E. Charmley.

Horeb Calvinistic Methodist Church (dates 1867 and 1905 - perhaps foundation and re-build?). © Gervase N. E. Charmley.

Libanus Chapel (Welsh Baptist). Dating from 1858, it was extended in 1908, but subsidence problems soon forced drastic alterations - the pediment was removed and a half-hipped roof with gablet put in its place. The structural problems continued however, and in 1985 when the photo was taken, cracks were evident in the building. It was closed in 1992 and demolished circa 2005. © Bruce Cunningham (1985).

The characterless Methodist Church. David Bolton advises that this is modern re-build on the same site as a previous church. © Gervase N. E. Charmley.

The former St. Alban (CiW) now a private residence. © Gervase N. E. Charmley.

Although listed as St. Mary, David Bolton advises that this isn't St. Mary, which was a stone church demolished some years ago, but the church hall. © Gervase N. E. Charmley. From an undated announcement here, that it had been made redundant, it's apparent that the hall was used for worship, and was known as St. Mary's Church Centre. My appreciation to Mike Berrell for bringing it to my attention.

Trinity Gospel Hall. © Gervase N. E. Charmley.