Irminenkloster (Irminen monastery )

Of the four former convents and monasteries (Mutterhaus der Borromäerinnen, a hospital today; St. Irminen, a home for senior citizens; Katharinenkloster, a technical school; St. Martin, a student dormitory), St. Irminen is the most interesting. The original convent was built into the ruins of a Roman granary in 640 so that even today there are Roman walls up to a height of 7.5 m/25 ft and a medieval wine cellar with a Roman Wall.