Strasbourg Cathedral or the Cathedral of Our Lady of Strasbourg, also known as Strasbourg Minster, is a cathedral. The cathedral was built in Gothic style. The belltower is 142 m high. It was the highest building in the world from 1647 to 1874. It is currently the second-highest cathedral in France, after Rouen Cathedral, which is 9m higher, at 151m. In 1880, Cologne Cathedral was finished (157m), and later Ulm minster, the highest Cathedral in the World.