In the early 1960s, the church was totally renovated. Shortly afterwards, on the night of 19-20 July 1963, as a result of welding work in the roof of the seminary, the entire building burnt down. The fire did not claim the external walls, the choir screen, the choir ceiling and the choir stalls, or the greater part of the wooden figures in the Chapel of the Mount of Olives. Thanks however to the enormous contributions of the conservator Albert Knoepfli and the deacon Alfons Gmür the church was rebuilt under the direction of Hans Burkard by 1967.