Butley Priory, sometimes called Butley Abbey, was a religious house of Canons regular (Augustinians, Black canons) in Butley, Suffolk, dedicated to The Blessed Virgin Mary. It was founded in 1171 by Ranulf de Glanville (c. 1112-1190), Chief Justiciar to King Henry II (1180-1189), and was the sister foundation to Ranulf's house of White canons (Premonstratensians) at Leiston Abbey, a few miles to the north, founded c. 1183. Butley Priory was suppressed in 1538.
Although only minor fragments of the priory church and some masonry of the convent survive at Abbey Farm, the underground archaeology was expertly investigated and interpreted in 1931-33, shedding much light on the lost buildings and their development. The remaining glory of the priory is its 14th-century Gatehouse, incorporating the former guest quarters. This exceptional building, largely intact, reflects the interests of the manorial patron Guy Ferre the younger (died 1323), Seneschal of Gascony to King Edward II 1308-1309, and was probably built in the priorate of William de Geytone (1311–32). Having fallen into decay after 1538, it was restored to use as a private house about 280 years ago.
Near-complete lists of the priors survive from 1171 to 1538, together with foundation deeds, deeds of grant, and records pertaining to the priory's manors, holdings and visitations. In addition there is a Register or Chronicle made in the last decades of the priory, and there are sundry documents concerning its suppression. Its post-Dissolution history has also been investigated. In private ownership in the area of the Suffolk Heritage Coast, the Gatehouse is now a Grade I listed building and is used as a venue for private functions, corporate events or retreats.