The towns grew, again often by monastic instigation, during this period and fairs were started. The church was very powerful at this period, particularly Glastonbury Abbey. After their church burnt down, the monks there "discovered" the tomb of "King Arthur" and were able rebuild their church. There were over 20 monasteries in Somerset at this period including the priory at Hinton Charterhouse which was founded in 1232 by Ela, Countess of Salisbury who also founded Lacock Abbey. Many parish churches were re-built in this period. Between 1107 and 1129 William Giffard the Chancellor of King Henry I, converted the bishop's hall in Taunton into Taunton Castle. Bridgwater Castle was built in 1202 by William Brewer. It passed to the king in 1233 and in 1245 repairs were ordered to its motte and towers. During the 11th century Second Barons' War against Henry III, Bridgwater was held by the barons against the King. In the English Civil War the town and the castle were held by the Royalists under Colonel Sir Francis Wyndham. Eventually, with many buildings destroyed in the town, the castle and its valuable contents were surrendered to the Parliamentarians. The castle itself was deliberately destroyed in 1645.