Because it was built on a marshland, the 1,5 m thick stone gothic vault began to crack on many places in spite of being secured by thick stone pillars at the sides of the church.
Keďže bol postavený na močaristej pôde, kamenná gotická klenba, hrubá približne 1,5 m začala na mnohých miestach pukať a to aj napriek tomu, že po stranách kostola ju zabezpečovali hrubé kamenné piliere.