Church of St. Cynllo, Llangunllo, the medieval church was substantially rebuilt in Early English style by John Middleton architect of Cheltenham in 1878.  The tower and porch were rebuilt by F R Kempson in 1896.

The church has a long, low nave and chancel, north transept and lean-to vestry, a broad three storey battlemented west tower, and a gabled south porch. The slate roofs have a decorative crosswork pattern in grey and blue. The windows are mainly paired lancets with drip moulds. A single 13th century lancet survives in the north wall.

The interior has a tall pointed chancel arch with engaged columns and transept arcading with moulded capitals. There is a fine roof in 15th century style with alternating tie-beam and open arch-braced trusses. A re-set 15th century doorway leads to the tower. One of the three bells is dated 1614, the others are dated 1869. Re-used medieval floor tiles are in the chancel. The font, pews, pulpit and lectern are all contemporary with the re-building and have trefoil and quatrefoil decoration. Four monuments at the west end include an 18th century one to the sons of James Meyrick of Pen-y-Clawdd. A previously recorded Royal Arms is now lost.

The church is reputedly on site of a 5/6th century monastic cell.

Source:
Cadw listing decription
Richard Suggett, Painted Temples: Wallpaintings and Rood-screens in Welsh Churches, 1200–1800, (RCAHMW 2021)

RCAHMW 2022