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. Carisbrooke was the strongest castle on the Island; though it is visible from some distance, it does not dominate the countryside like many other castles.
There are traces of a Roman fort underneath the later buildings. Seventy-one steps lead up to the keep; the reward is a fine view. In the centre of the castle enclosure are the domestic buildings; these are mostly of the 13th century, with upper parts of the 16th century. Some are in ruins, but the main rooms were used as the official residence of the Governor of the Isle of Wight until the 1940s, and they remain in good repair.
The Great Hall, Great Chamber and several smaller rooms are open to the public, and an upper room houses the Isle of Wight Museum. Most rooms are partly furnished.
One of the main subjects of the museum is King Charles I. He tried to escape from the castle in 1648, but was unable to get through the bars of his window.
The name of the castle is echoed in a very different structure on the other side of the world. A visit to the castle by James Macandrew, one of the founders of the New Zealand city of Dunedin, led to him naming his estate "Carisbrook". The name of the estate was later used for Dunedin's main sporting venue.