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 House the first President of Harvard University. The tower of Dunster House is inspired by, but somewhat smaller than, the famous Tom Tower of Christ Church, Oxford. Above the east wing is the Dunster family coat of arms, and above the west wing is the coat of arms of Magdalene College, Cambridge, where Henry Dunster matriculated in 1627. Magdalene College commemorated the relationship between the two universities by sending medieval tracery stones from the First Court of Magdalene; these are now set in the wall near the doors to J-entry of Dunster House. Dunster is located on the banks of the