Bradenstoke Priory is situated near the village of Bradenstoke-cum-Clack in the parish of Lyneham, some 10 miles W of Swindon in the N of the county. The priory is sited on a high ridge of land which overlooks the Avon valley. The priory was dissolved in 1539, and its remains, including part of the 14th century hall and undercroft of the guest house that had formed the W range of the cloister, were subsequently used as a farmhouse. There was a 15thc tithe barn and a holy well nearby. The site was investigated in the 1920s and the plan of the monastic buildings and the 12th century church were recovered. Unfortunately most of this fabric was removed in 1929 by the then owner, the American newspaper publisher William Randolph Hearst, who had the hall removed and reconstructed at his property of St Donat's Castle in the Vale of Glamorgan. The only buildings that survive on site today are the undercroft of the guest hall with a 14th century garderobe tower at its north-west corner, and both are in a ruinous condition. No Romanesque fabric survives on-site, but a chevron voussoir, said to be from Bradenstoke, is preserved at Cartmel Priory (qv)

Bradenstoke was held by Strami in 1066 and by Edward of Salisbury in 1086. It was assessed at 16 hides and 1 virgate, of which 7½ hides were in demesne. The priory was founded by Walter le Eurus, son of Edward of Salisbury, who gave the vill of Bradenstoke and its church to found a convent of canons regular, which was to be a daughter house of St Mary's Abbey, Cirencester. The foundation charter was confirmed in the presence of Bishop Roger of Salisbury, in 1139. The priory was dedicated to St Mary. Cartmel Priory (Lancashire) was founded from Bradenstoke by William Marshall, later Earl of Pembroke, and colonised by monks from this house, although from its foundation it was independent of Bradenstoke. As noted above, the priory was dissolved in 1539.

No Romanesque material survives on the site, but a chevron voussoir is preserved at the daughter house of Cartmel (qv). It was probably taken to Cartmel as part of Hearst's redistribution of medieval materials in the late 1920s, but this has yet to be confirmed.