Under this building lie the foundations of a tower of Bridgwater Castle. William Briwere, a loyal subject of King John, built the Castle between 1200 and 1215 AD. The Castle protected the strategic river crossing. From here was administered the manor of Bridgwater.
William Brewer (or Briwere) (died 1226) was a prominent administrator and justice in England during the reigns of Richard I, King John, and Henry III. He was also notable as a founder of a number of religious institutions.