The  12th-century keep and the castle's  well lie within the inner bailey. The keep, with its entrance on the first floor, survives as a shell, with the west wall, interior floors and roof missing, as a result of bombardment in the 17th century. With its sloping plinth to aid defence, flat roof and four turrets, this square four-storey building was over .
The 12th-century keep and the castle's well are located within the inner bailey. The keep, with an entrance on the first floor, remains as a shell due to damage in the 17th century. It has a sloping base for defense, a flat roof, and four turrets; originally it was .