The current chancel, west tower, and north aisle were built in the 15th century.

Henry III Bagley of Chacombe, Northamptonshire, cast the second bell in 1746, presumably at his foundry at Witney.

James Wells of Aldbourne, Wiltshire, cast the treble bell in 1807.

St Mary's has also a Sanctus bell that was cast in about 1890 by an unknown founder.

[1] St Mary's parish is part of the benefice of Cherbury with Gainfield in the Archdeaconry of Dorchester of the Diocese of Oxford.