This building, called a cathedral, is in fact a collegiate the construction of which, begun in 1421, was completed only in 1893 with the erection of the tower, the highest in the country (100m). The tympanum of the main door, made by E. Küng, is a remarkable illustration of the Last Judgement. After climbing 270 steps inside, you can reach the tower where you can enjoy a magnificent panorama over the city.