A historical castle that is a must to visit if you...

A historical castle that is a must to visit if you're a fan of this type of thing.
Have had diffrent rolles since it was built in the 11th century, not just for defense of the city but also as a palace and prison.
Have survived time and is still in very good condition.
A lot to see and should have a whole day to spend here.

One of many nice old castles that I passed by, during my roadtrip in the U.K back in 2001, which I took time to visit and enjoyed exploring and still remember it as it was yesterday.