The oldest parts of Erfurt 's '' Alte Synagoge '' ( Old Synagogue ) date to the 11th century . It was used until 1349 when the Jewish community was destroyed in a pogrom known as the Erfurt Massacre . The building had many other uses since then . It was conserved in the 1990s and in 2009 it became a museum of Jewish history . A rare Mikveh , a ritual bath , dating from c. 1250 , was discovered by archeologists in 2007 . It has been accessible to visitors on guided tours since September 2011 . In 2015 the Old Synagogue and Mikveh were nominated as a World Heritage Site . It has been tentatively listed but a final decision has not yet been made
Erfurt Massacre
Erfurt massacre (1349)
Erfurt