The 1356 Basel earthquake caused extensive damage to the church walls , arches , and tower . Repairs proceeded slowly . The choir was rebuilt in 1359 and the roof was rebuilt in 1378 – 80 . During the early stages of construction of the Minster , this church was still being used . The nave was finally demolished between 1449 – 51 and the tower remained until 1493
1356 Basel earthquake
1356 Basel earthquake
Bern Minster