The manor was originally run by Godwin, Earl of Wessex and later by his son Harold Godwinson the last Saxon King of England. The first Norman lord of Westerham was Eustace II of Boulogne, and the town appears in the Domesday Book as Oistreham. By 1227 Henry III granted Westerham a market charter, making the new village a major player in the buying and selling of cattle in Kent, a tradition that survived to 1961 when the last cattle market was held. St Mary's Church is thought to date from the 13th century, although it was much altered in Victorian times. In 1503 the Protestant martyr John Frith was born in the town.