Subterranean catacombs under the Jesuit church in Klatovy were built in 1656-1676. Members of the order, as well as notable citizens, noblemen from the surroundings and other benefactors were buried there. Burying in the crypt was ended by the emperor Joseph II's order in 1783.
Thanks to an elaborate system of air circulation bodies in oak coffins were gradually mummified and conserved. The crypt can be visited through the entry on the right-hand side of the church.
References:Visby Cathedral (also known as St. Mary’s Church) is the only survived medieval church in Visby. It was originally built for German merchants and inaugurated in 1225. Around the year 1350 the church was enlarged and converted into a basilica. The two-storey magazine was also added then above the nave as a warehouse for merchants.
Following the Reformation, the church was transformed into a parish church for the town of Visby. All other churches were abandoned. Shortly after the Reformation, in 1572, Gotland was made into its own Diocese, and the church designated its cathedral.
There is not much left of the original interior. The font is made of local red marble in the 13th century. The pulpit was made in Lübeck in 1684. There are 400 graves under the church floor.