Dunster Castle evidence of a fortification at Dunster was an Anglo-Saxon "burgh". This was built on the summit of the hill and was possibly intended to protect the region against sea-borne raiders; by the mid-11th century it was controlled by a local nobleman called Aelfric. In 1066 the Normans invaded south-east England, defeating the English forces at the battle of Hastings: in the aftermath of the victory, William the Conqueror entrusted the conquest of the south-west of England to his half-brother Robert of Mortain. Expecting stiff resistance, Robert marched west into Somerset, supported by forces under Walter of Douai, who entered from
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