Carisbrooke Castle is a historic motte-and-bailey castle located in the village of Carisbrooke (near Newport), Isle of Wight, England. 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.
Charles I was imprisoned here for fourteen months before his execution in 1649. Afterwards his two youngest children were confined in the castle, and Princess Elizabeth died there. From 1896 to 1944, it was the home of Princess Beatrice, daughter of Queen Victoria, as Governor of the Isle of Wight. (Wikipedia).