Columbia subject headings:
Jews--Germany--History.
Harvard subject headings:
Princeton subject headings:
Christianity and other religions--Judaism.
Jews--Germany--Aachen--History--To 1500.
Jews--Germany--Cologne--History--To 1500.
Judaism--Germany--Aachen--History--To 1500.
Judaism--Germany--Cologne--History--To 1500.
Judaism--Relations--Christianity.