After the Norman Conquest in 1066, feudal rule was established in Dorset and the bulk of the land was divided between the Crown and ecclesiastical institutions. The Normans consolidated their control over the area by constructing castles at Corfe, Wareham and Dorchester in the early part of the 12th century. Over the next 200 years Dorset's population grew substantially and additional land was enclosed for farming to provide the extra food required. The wool trade, the quarrying of Purbeck Marble and the busy ports of Weymouth, Melcombe Regis, Lyme Regis and Bridport brought prosperity to the county. However, Dorset was devastated by the bubonic plague in 1348 which arrived in Melcombe Regis on a ship from Gascony. The disease, more commonly known as the Black Death, created an epidemic that spread rapidly and wiped out a third of the population of the country.