The scant remains of a substantial Norman motte and bailey castle, perched on a high natural knoll overlooking the River Adur. It was built in 1075, by William de Braose, as one of a number of defensive and administrative centres to enforce regional control following the Norman Conquest.

The castle was later seized by King John, who imprisoned Lady de Braose and her two sons. Their death from starvation fuelled the Barons' revolt that lead to the Magna Carta.