“This is a good example of how it started,” says Jan Quintus Zwart of the Bovenkerk Kampen Foundation. “The church that does not subside evenly and then we get space between the ribs and if that space becomes too large then that rib will come loose and you will see that it is already cracking there”, Zwart points to a place where there is indeed a large crack. is visible. “It’s coming under too much pressure.”