Carisbrooke Castle is a historic motte-and-bailey castle located in the village of Carisbrooke, near Newport, Isle of Wight, England. Charles I was imprisoned at the castle in the months prior to his trial.
The site of Carisbrooke Castle may have been occupied in pre-Roman times. A ruined wall suggests that there was a building there in late Roman times. The Anglo-Saxon Chronicle mentions that Wihtgar, cousin of King Cynric of Wessex, died in AD 544, and was buried there. The Jutes may have taken over the fort by the late 7th century. An Anglo-Saxon stronghold occupied the site during the 8th century. Around 1000, a wall was built around the hill as a defence against Viking raids.