Bristol Castle was a Norman castle built some time between 1066-1087 to defend the town of Bristol, and was unfortunately demolished in 1650 by Act of Parliament. As a result, very little evidence of the original, large buildings remains visible, and what little can be seen can be found in the Castle Park near the Shopping Centre.
The first castle built at the site was of a standard motte and bailey design, first mentioned in 1088 during Geoffrey de Montbrays rebellion against William Rufus, and was presumably erected on the command of William the Conqueror, who owned Bristol.
Rufus won the battle against Montbray, and gave Bristol Castle to one of his loyal followers - Robert Fitzhamon, who (upon his death) passed it to his eldest daughters husband - Robert Fiztroy. 1st Earl of Gloucester. Later, the castle passed to the royal hands of Henry III, who expanded upon the building with a barbican, gate tower and a magnificent great hall. Later still, after Edward I had invaded Wales in 1283, Dafydd ap Gryfudds sons - the last 2 Princes of Wales, were imprisoned at the castle for life.
The castle was sadly demolished in 1650, leaving just one tower that was later torn down in 1927, and its moat was covered over in 1847 (though is still mostly traversable by boat). After that, much of the area was destroyed during the Bristol Blitz, and now stands as a redeveloped, public open space.