Mongewell is a small village in the parish of Crowmarsh Gifford on the east bank of the river Thames. The church, which is built of flint with stone dressings, consists of a nave, chancel and west tower. It dates from the 12thc and was remodelled in the picturesque Gothick style for Shute Barrington, Bishop of Durham, in 1791.The church was restored under the direction of Lewis Wyatt in 1880. The nave is now roofless and the church is in the care of the Churches Conservation Trust. Two12thc corbels have been reset on either side of the 19thc chancel arch.