Cologne Cathedral (Kölner Dom, full name Hohe Domkirche St. Peter und Maria), is a Catholic cathedral in Cologne, Germany, is an iconic building in Cologne. Of all churches, it ranks second in height in Germany (after Ulmminster Cathedral in Ulm), and third in the world, on scale. It is the largest church in northern Europe, with a grandeur and delicateness, and is known as the most perfect example of Gothic church architecture. It was built in 1248 and was completed intermittently until 1880 by William I. It took more than 600 years to repair and repair.