William de Mohun of Dunster, 1st Earl of Somerset William de Mohun of Dunster, 1st Earl of Somerset William de Mohun of Dunster, Earl of Somerset (c. 1090 – c. 1155), 2nd feudal baron of Dunster, was a favourite of Empress Matilda and a loyal supporter of her in the war against King Stephen, during which he earned the epithet of the "Scourge of the West". William was the son of William de Moion, who was seigneur of Moyon which is close to Saint-Lô. The elder William was High Sheriff of Somerset in 1084. During the war between Matilda and Stephen, Stephen marched against Mohun's castle at Dunster, but
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*.