Badly damaged by an air raid attack in 1941 it was subsequently restored but closed in the 1980s.

William Lewis of Carmel Penpound (which preceded Calfaria, Aberdare, was one of the signatories.

[1] One of the Baptist pioneers at Cwmbach was William Thomas David of Abernant-y-groes Uchaf, who owned the land where the first deep mine in the Aberdare Valley to produce sale coal was opened in 1837.

The Education Reports of 1847 state that his annual stipend was £40 per annum and that he sustained himself by keeping a day school.

[5] The next minister was William Harris from 1859, but in 1862 he moved to the nearby church at Heolyfelin.

[6] During his time at Cwmbach, David Thomas served as a member of the Aberdare School Board.

[4] On 30 May 1941 the chapel was badly damaged by enemy war action and the adjoining vestry completely destroyed.

Nevertheless, the chapel celebrated its centenary in 1944 and services were held at the schoolroom at Ynyscynon which had been built during the ministry of Joseph James.