The cathedral is about 94 m long, 28 m broad, 26 m high, and the four towers are each about 81 m high. There are lots of sculptures in the cathedral. One of the most magnificent ones is the marble tomb of Henry II, the founder of the cathedral, and his wife, the empress Cunigunde. It took the famous sculptor Tilman Riemenschneider 14 years to carve: between 1499 and 1513. The tomb is slightly higher than floor level because below there is a crypt. The carvings round the side tell of various episodes in the lives of the imperial couple. 