During the Norman Conquest, the De Brus family gained over-lordship of the land surrounding Hartlepool. William the Conqueror subsequently ordered the construction of Durham Castle, and the villages under their rule were mentioned in records in 1153 when Robert de Brus, 1st Lord of Annandale became Lord of Hartness. The town's first charter was received before 1185, for which it gained its first mayor, an annual two-week fair and a weekly market.[1][2]