St. Leonard's Crypt

St. Leonard's Crypt under the Wawel Cathedral in Kraków, Poland, is a Romanesque crypt founded in the 11th century (around 1038–1039) by Casimir I the Restorer who made Kraków his royal residence as the capital.

At the end of the 11th century construction work began on the cathedral called ‘Hermanowska’.

More is known about this new structure because its image is featured on a chapter house seal from the 13th century and its present-day remnants are well preserved – including the lower part of the Silver Bell Tower.

This period also gave rise to the Rotunda by the Bastion of Ladislaus IV of Hungary from the 12th century, which could have been a baptistery for the royalty, the Church near the Dragon's Den, and the Rotunda by the Sandomierska Tower – probably from the second half of the 11th century.

The crypt holds the tombs of Polish kings and heroes such as: Pope John Paul II said his first Mass on the altar in St. Leonard's Crypt on November 2, 1946, one day after his priestly ordination.