The Basel Minster (German: Basler Münster) is one of the main landmarks and tourist attractions of the Swiss city of Basel. It adds definition to the cityscape with its red sandstone architecture and coloured roof tiles, its two slim towers and the cross-shaped intersection of the main roof. The Münster is listed as a heritage site of national significance in Switzerland.
Originally a Catholic cathedral and today a Reformed Protestant church, it was built between 1019 and 1500 in Romanesque and Gothic styles. The late Romanesque building was destroyed by the 1356 Basel earthquake and rebuilt by Johannes Gmünd, who was at the same time employed for building the Freiburg Münster. This building was extended from 1421 by Ulrich von Ensingen, architect of the towers at the Ulm Minster and the Strasbourg Cathedral. The southern tower was completed in 1500 by Hans von Nußdorf.
The hill on which the Minster is located today was a Celtic fortified city in the late Celtic Era in first century BC. The Gallic wall of this city, was uncovered during archeological excavations in 1970. Both the gate site, and the historical run of the street, can be partly retraced. This road parted at today's position of the Minster where it is presumed there was a small temple that later was replaced by a Roman fort.