Capel Hermon (Welsh Calvinistic), Cwmdu, Llanrhaeadr

Capel Hermon stands on the lower slopes of the Berwyn range, approximately four miles from Llanrhaeadr-ym-Mochnant on the road to Llanarmon, D.C. Opened in 1907, it replaced a chapel, built by the Calvinistic Methodists on the same site in 1827 to serve a sparsely populated agricultural district.

Described as "late Gothic," style in the contemporary press, it rather displays distinct Art Nouveau influences in the design of the tracery. Built at a cost of £2,700, the chapel could hold up to 100 worshippers, and the adjoining schoolhouse, (described as a vestry in the listing notice), which opened into the chapel, could accommodate about 80. The woodwork was of oak, and the building was heated by hot water apparatus. Behind the pulpit was an organ chamber. The Rev. R Ylon Hughes had succeeded in getting Mr Carnegie to pledge of £200 towards the cost of an organ

Three memorial stones were laid, two commemorating the Congregational Revival of 1904-5 and the third for the rebuilding, commenced in 1906. Both reports of the opening give the architects as Shayler and Ridge, of Oswestry, and the contractor as Robert Arthur Jones, Llanfyllin.