Church of St. Mary, Seagry

The church gained its name of the Church of St. Mary the Virgin by 1763. It had a chancel and nave with a south chapel, south porch and west bell tower. It underwent alterations in the fourteenth century and was completely rebuilt at a cost of £860 in 1849 to the plans of John Henry Hakewill. The sum of £860 had been raised from a number of sources: £100 from a parish rate; £200 for the chancel from the patron, the Earl of Caernarvon and £100 for the south transept from Lord Holland. The remainder was raised by public subscription. The rebuilding began on 7th June 1849 and the church was reopened on 8th November of the same year. The font, rood screen, two effigies, memorial tables, bell and some floor tiles were retained from the original church, the bell being recast in 1849.

Stained glass in the two lancet windows of the south porch was given by Hakewill. The organ was built in 1888 and acquired in 1891. Memorial tablets in the church include one dedicated to Rebecca Stratton and one to her son Robert. The effigy of the church's founder, Walter de Clifford, lies in the south transept and that of Isabell
Mompesson, in the chancel.

Parish registers dating from 1605, other than those in current use, are held at the Wiltshire & Swindon History Centre.