Historic church in Didcot. Church. C12, chancel rebuilt and south aisle added c.1340, C15 alterations, C19 north aisle, vestry, south porch and steeple. Limestone uncoursed rubble with stone dressings; lead roof to nave and south aisle; slate roof to north aisle; old plain-tile roof to chancel; shingle hanging and roof to tower. Aisled 3-by nave, chancel and west tower.