Sir Henry de la Pomeroy captured the Mount in 1193, on behalf of Prince John, in the reign of King Richard I. The monastic buildings were built during the 12th century. Various sources state that the earthquake of 1275 destroyed the original Priory Church, although this may be a misunderstanding of the term "St Michael's on the Mount" which referred to the church of St Michael atop Glastonbury Tor. Syon Abbey, a monastery of the Bridgettine Order, acquired the Mount in 1424. Some 20 years later the Mount was granted by Henry VI to King's College, Cambridge on its foundation. However, when Edward IV took the throne during the Wars of the Roses the Mount was returned to the Syon Abbey in 1462.