Bury Castle near Brompton Regis in the English county of Somerset was an Iron Age univallate hillfort which was reused with the creation of a motte after the Norman Conquest.

[2] In the late 1130s, a civil war, known as the Anarchy, broke out in England between the supporters of King Stephen and the Empress Matilda.

A motte and bailey castle was built on the Bury Castle side, probably by William de Say.

In 1198 Richard I confirmed that Brompton should be part of the inheritance of Matilda.

[3] The motte measures 23 metres (75 ft) and was placed on the southern tip of the promontory, with the bailey beyond around 60 metres (197 ft) across.