The Ducal Crypt located under the chancel holds 78 bronze containers with the bodies, hearts, or viscera of 72 members of the Habsburg dynasty. Before his death in 1365, Duke Rudolf IV ordered the crypt built for his remains in the new cathedral he commissioned. By 1754, the small rectangular chamber was overcrowded with 12 sarcophagi and 39 urns, so the area was expanded with an oval chamber added to the east end of the rectangular one. In 1956, the two chambers were renovated and their contents rearranged. The sarcophagi of Duke Rudolf IV and his wife were placed upon a pedestal and the 62 urns containing organs were moved from the two rows of shelves around the new chamber to cabinets in the original one.