Under construction for more than 40 years, the cathedral was completed in 1133, and today is Britain's largest, best-preserved Norman stronghold and one of its surviving Romanesque palaces. The structure is not only breathtaking to view, it is also architecturally innovative, as it was the first English building with ribbed vault construction. It is also the first stone-roofed cathedral in Europe, an architectural necessity because of its role as a border fortress.
The treasury houses such relics as the original 12th-century door knocker, St. Cuthbert's coffin, ancient illuminated manuscripts, and more. You can still attend daily services in the sanctuary.