In the wake of the Norman Conquest and Norman invasion of Wales, Gower became a marcher lordship which included not only the peninsula itself but also the land to the east as far north as the Aman river and east to the river Tawe. This included the site of Swansea town, which was designated the capital of the area. Although Kilvey Hill is to the east of the Tawe, the manor of Kilvey was also associated with Gower. The new Norman lords encouraged English immigration into the area. This immigration was largely from the West Country.