Dunster Castle motte, or Upper Ward, and an area below shaped to form the bailey, or Lower Ward. Somerset became more stable in the aftermath of the post-invasion period and the unsuccessful 1068 rebellion against Norman rule. It was common in the period for the Normans to build religious houses to accompany major castles, and accordingly William de Mohun endowed a Benedictine priory at Dunster in 1090, along with its parent abbey at Bath. The River Avill was important for trade; the region around Dunster was rich with fisheries and vineyards, and Dunster Castle prospered. Stone fortifications were built on the site
Dunster the priory in Bath. In 1346 Cleeve Abbey built a nunnery in Dunster, but it was never inhabited by nuns and was used as a guest house. The priory was dissolved as part of the dissolution of the monasteries in 1539. Dunster was part of the hundred of Carhampton, but St George's was the seat of the local deanery, overseeing the area's parish churches. Dunster had become a centre for woollen and clothing production by the 13th century, with the market dating back to at least 1222, and a particular kind of kersey or broadcloth became known as 'Dunsters'. The