It was used as a fortress right up until the end of the English Civil War, during which it was a Royalist headquarters. When Parlementarian forces finally captured it, they razed it so it could never be used again.
hmh, why do i have the Feeling that ill be in Wikipedia in 3, 2, 1, .. yes i am. ^^
Imagine seeing a freshly constructed castle, before the weather has time to work on it.