The Anglican Church at Flint Mountain was constructed in 1874 and consecrated in 1875 when it was dedicated to St. Thomas. It is built of stone brought from local quarries, on land donated by Edward Bate to the design of a local architect, John Hill. The building was used from Monday to Friday as a day school and, thus, was the earliest place of learning in the village. During school hours a screen was drawn across the Sanctuary, the most sacred part of the church, and the body of the church was used as a classroom.
The church is constructed of rock-faced stone under steeply-pitched slate roofs. It consists of nave, narrower chancel, gabled south-west porch, and west bellcote; lit through lancet windows. On the north-east is a (?) vestry with pitched roof, ridge parallel with church roof.
Sources:
http://www.c3648749.myzen.co.uk/Churches.html
D.R.Thomas, History of the Diocese of St Asaph vol.2 (1911), p.181.
E.Hubbard, Buildings of Wales: Clwyd (1986), p.350.
Google Street View, March 2011.

David Leighton, RCAHMW, 30 October 2015