Carlisle is a city of vital strategic importance, its magnificent Castle founded in 1092 by William the Conqueror's son now stands as testament to the years of feuding over the English-Scottish border. Visit the nearby Citadel built by Henry VIII with its original 'twin drum' bastions. In Carlisle, you can also relive the times between the 14th to the 17th century, when the Western end of the border was a lawless place, beset by feuds and bloody battles between warring families to uphold their honour and protect property and possessions.The city's Cathedral, with its famous 14th Century stained glass window, is a must-see as is the award winning Tullie House Museum and Art Gallery, with its innovative Millennium Gallery.