 Complete the following phrase:  After the Norman conquest, William I granted the manor of Bridgnorth to Roger de Montgomerie. The town itself was not created until 1101, when Robert of Bellême, 3rd Earl of Shrewsbury, the son of Roger de Montgomerie, moved from Quatford, constructing a castle and a church on the site of the modern-day town. The town became a royal borough on Robert Bellêmes attainder in 1102. The castles purpose was to defend against attacks from Wales. The town was attacked and burnt by Roger Mortimer, 1st Earl of March during the 