Search for towns which held borough rights in the medieval or the early modern period. German towns were recorded systematically, towns outside of Germany were only included in exceptional cases.
Search for German city books which were sorted into categories depending on their contents. Both preserved and lost city books were recorded and assigned to their city of origin.
Search for city book editions, research about city books or archival fonds. Only literature about German resources was recorded systematically. Further literature was only included in exceptional cases.