The Speyer cathedral crypt is the largest Romanesque Hall crypt at all. Overall, she has a width of 35 meters and a length of 46 meters. The high of Vault is seven meters - for a lower church tremendous measure. The crypt divides into four rooms, which are under the choir - space, the crossing and the transept of the cathedral. in the Center under the crossing is a square room, which is divided into three vaulted yokes each. The number three stands for the divine Trinity, the square with its four pages for the earthly (four seasons / Cardinal points / elements). Emphasize in the ceiling area Belt bows of alternating yellow and red sandstones this outline. North and south of this central Room are the cross arms of the crypt, also divided into nine square fields. The mighty pillars and thick outer walls of the crypt carry the burden of the walls above and Vault. In the east closes under the choir of the cathedral another arm of the crypt, in a semicircular Apse ends. This is the oldest part of the cathedral, where construction began.