Feudal barony of Dunster of Dunster, was as follows: William de Moyon (died post 1090) ("alias" de Moion, later de Mohun), Domesday Book holder of Dunster Castle, 1st feudal baron of Dunster, was Seigneur of Moyon near Saint-Lô in Normandy and was Sheriff of Somerset in 1086. He was the founder of the English "de Mohun" family, prominent in the Westcountry, extinct in the male line seated at Dunster in 1375 and extinct in the junior male line seated at Mohuns Ottery in Devon at about the same time. He is recorded in the Domesday Book of 1086 as holding the manor of "Torre"
Dunster church was shared for worship between the monks of Dunster Priory and the parishioners, however this led to several conflicts between them. One outcome was the carved rood screen which divided the church in two with the parish using the west chancel and the monks the east. It was restored in 1875–77 by George Edmund Street. The church has a cruciform plan with a central four-stage tower, built in 1443 with diagonal buttresses, a stair turret and single bell-chamber windows. Dunster, in Exmoor National Park, has many listed buildings including 200 Grade II, two Grade I and two Grade II*.