Columbia subject headings:
Gems, Classical--Collectors and collecting--Germany--History--18th century.
Gems, Classical--Collectors and collecting--Germany--History--19th century.
Gems, Classical--Collectors and collecting--Germany--History--20th century.
Harvard subject headings:
Cameos--Collectors and collecting--Germany--History.
Gems, Classical--Collectors and collecting--Germany--History.
Gems--Collectors and collecting--Germany--History.
Gems--Historiography.
Glyptics--Collectors and collecting--Germany--History.
Princeton subject headings: