The first discernible traces of a cathedral date from the Carolingian period. This building was destroyed in 917 when the The town was attacked by the Hungarians. At the beginning of the 11th century, Emperor Henry II endowed Basel with a magnificent new cathedral. In the last quarter of the 12th century, Henry's cathedral was replaced by a late Romanesque building which was restored in the Gothic style after the devastating earthquake of 1356.

Today this fine square is used for all kinds of events and serves as a living open space for people to meet.
With its red sandstone walls, multicoloured roof tiles and twin towers, the Cathedral is a dominant feature of the city. The crypt, the choir, the tomb of Erasmus of Rotterdam, the Galluspforte and the two cloisters are a testimony to the eventful history of its construction over a period of several centuries.