On south side, single round arched light with external rebate and drilled holes for shutter to left of porch, and 3-light stone mullion window of C15 to right with arched lights and square hoodmould.
Chancel has 2 small lancets of north side, 3 stepped lancets with arched hoodmould and carved stops to east, and central priest's door with shouldered arch to south flanked by single lancet to left and square headed opening to right.
Interior: C14 wagon roofs to nave and chancel.
C13 stone screen on chancel side of pointed chancel arch with moulded edge and elbow of one return stall on south side.
Wall paintings survive in nave and chancel from C12 to C15.
SP0701 : Detail of wall paintings in Ampney St Mary church
Nave has figures of Saint Christopher and Saint George and the Dragon on north wall, and large painting depicting "Keep Holy the Sabbath Day" on south wall.
Norman font with chevron moulding.
SP0701 : Ampney Crucis, Holy Rood Church: Plain Norman cylindrical font with well executed later repair
The church was abandoned after C15 due to an outbreak of the Black Death and is now isolated from the village which moved to the hamlet north of the main road (A417) formerly called Ashbrook, now Ampney St. Mary.