Abstract
In the early 12th century, a Jewish community first settled in the medieval city of Erfurt (Thuringia). The synagogue, the mikvah (ritual bath), and several private dwellings of this community are preserved until today. A room in one of the private houses formerly inhabited by Jews has a wooden beam ceiling, dating from 1244, which is colourfully painted with tendrils, leaves and blossoms. This ceiling was added to the room together with other extensive refurbishments: the former door in the eastern wall was replaced with a built-in cupboard, a new door as well as a recess for an oil lamp were added to the northern wall, and the room received an oriel window. Furthermore, the ceiling shows the remains of suspensions for lamps, and traces of shelves are still visible on the walls. As an ensemble, these alterations suggest that the chamber was converted into a prayer room in the mid-13th century. As the only preserved example of a medieval Jewish private room for prayer, it constitutes an important source for understanding Jewish piety in the German-speaking lands.