Around 1270 , a larger synagogue incorporating parts of the earlier building was constructed . The western façade , with five lancet windows and a large rosette window , dates from this time . In the early 1300s , it was extended and another storey was added . After the Erfurt Massacre of 1349 , in which the Jewish population was murdered and expelled from the city , the synagogue was damaged . The city of Erfurt took ownership of the building and later sold it to a local merchant . It was converted into a warehouse and a vaulted cellar was built underneath . The alterations considerably changed the interior of the building . For the next 500 years it was used for storing goods
Erfurt Massacre
Erfurt massacre (1349)
Old Synagogue (Erfurt)