Photos are now in the Gallery of of Bethel (Wesleyan Methodist) Chapel, Mount Road, Cefn Rhigos, near Hirwaun.
Built in 1839 in the northernmost reaches of the Cynon Valley, in the quiet rural village of Rhigos.
There is seating for 120.
The design is plain and simple. Surely that is the hallmark of good design and a recipe for Chapel longevity ?
How many of the Chapels of Cynon Valley, and indeed, Wales, have closed due to the huge costs of maintaining complex building structure ?

Photos and references on
Aberdare Trinity Chapel are now available in the Gallery.
The Chapel is located at Weatherall Street, Aberdare, on the corner, opposite Aberdare Palladium.
The Chapel was built in 1867, making it just over one hundred and forty years old.
There is a set of photos in the Gallery of Park Street Chapel (or Park Street Methodist Church) Blaenafon, as used by the BBC for the Hunger March Concert as part of the Coal House series.
Tabernacle Independent Chapel, Fishguard.
Hidden away in a side-street in Fishguard town, Pembrokeshire.
St Mary’s Church, Fishguard : According to scholars from the
University of Lampeter in their Imaging the Bible Project website, “St Mary’s Parish Church, Fishguard, Pembrokeshire, was built in 1855–57 on the site of a medieval chapel, to the designs of an amateur architect, Thomas Clark of Trowbridge. The church is in an idiosyncratic Romanesque style, but contains several features of interest, including important work by
John Petts (1986 and 1989) and Celtic Studios (1953, 1969 and 1970).” - Reference
http://www.imagingthebible.org/wales/research/fieldwork/fishguard.html
Note - the Imaging the Bible website (see link above) has some examples of the interior of this Church including stained glass designs by John Petts