Columbia subject headings:
Harvard subject headings:
Fiefs--Germany--Frankfurt am Main--History--Sources.
Frankenstein family--Archives--Catalogs.
Frankfurt am Main (Germany)--History--Sources.
Land tenure--Germany--Frankfurt am Main--History--Sources.
Stadtarchiv Frankfurt am Main--Catalogs.
Princeton subject headings:
Fiefs--Germany--Frankfurt am Main--History--Sources.
Frankenstein family--Archives--Catalogs.
Frankfurt am Main (Germany)--History--Sources.
Land tenure--Germany--Frankfurt am Main--History--Sources.
Stadtarchiv Frankfurt am Main--Catalogs.