Orbis Latinus - List of City Names A digitization of the original work of Dr. Johann Grässe (1909), reflecting the geographical and political reality of that time (Columbia University).
Cathedral Libraries Catalogue: Names of Printing Towns English forms for the Latin names of printing towns as found in early printed books. There are also some references for early spellings of vernacular forms of names.
RBMS/BSC Latin Place Names File Locations from the imprints of books before 1801 and their vernacular equivalents (Brigham Young University).