A pilgrims' way-station on the European pilgrims' way to Santiago de Compostela. At its core it is a roman building, as can be seen by a couple of small round-arched windows. The building was altered around 1500 and enlarged by the choir loft.
Inside: beautiful bosses, epitaphs and tombstones; furthermore, there are mysterious square stones with relief depictions of concentrical circles, some of them with added arms bent up.
It is the centre of the lower city (Untere Stadt) which was inhabited by gardeners and field workers during Goethe's time. He wrote in 1797 that this quarter was „extremely bad, with poorly built housing... whose streets were quite messy due to so much dung.“