Carlisle Castle Cumbria
From the 18th century to the 1960s the castle was the headquarters of the Border Regiment, one of the oldest in the army. English Heritage now shares the site with a number of organisations, notably the Territorial Army and the Museum of the Border Regiment.
For 500 years, until the 1603 Act of Union, Carlisle Castle was the principal fortress of England’s ‘Western March’ against Scotland. City and castle grew up together in a state of perpetual watchfulness: held to siege ten times in its history, Carlisle Castle is the most besieged place in the British Isles.