 Complete the following phrase:  Wolvesey Castle, also known as the Old Bishops Palace, is a ruined building in Winchester, Hampshire, England that was a bishops palace, and was briefly fortified during the later years of Henry of Blois, the Bishop of Winchester. The first building on the site, an eyot in the River Itchen known as Wulveseye or Wulfs island, was constructed around 970 by Æthelwold of Winchester, the Bishop of Winchester from 963 to 984, as his official residence or palace. Winchester came under siege during the 