 Complete the following phrase:  By the end of the Saxon period, Wareham had become one of the most important towns in the county, to the extent that it housed two mints for the issue of Royal money. The Burghal Hidage lists the town as 1,600 hides, the third largest in the realm. During the Norman conquest of England, in late 1067, William I harried the town as his army passed into the west to lay siege to Exeter. The Normans later built a castle on the banks of the River Frome, at a site acquired from the Abbot of Shaftesbury and now known as Castle Close, which became the focus of much fighting between the forces of Stephen and Matilda during the period of 