 Complete the following phrase:  The first castle at Berkeley was a motte-and-bailey, built around 1067 by William FitzOsbern shortly after the Conquest. This was subsequently held by three generations of the first Berkeley family, all called Roger de Berkeley, and rebuilt by them in the first half of the 12th century. The last Roger de Berkeley was dispossessed in 1152 for withholding his allegiance from the House of Plantagenet during the conflict of 