Columbia subject headings:
Aesthetics, Modern--18th century--Congresses.
Art--Collectors and collecting--Germany--History--18th century--Congresses.
Harvard subject headings:
Art--Collectors and collecting--England--History--18th century--Congresses.
Art--Collectors and collecting--France--History--18th century--Congresses.
Art--Collectors and collecting--Germany--History--18th century--Congresses.
Art--Collectors and collecting--Netherlands--History--18th century--Congresses.
Princeton subject headings:
Art--Collectors and collecting--England--History--18th century--Congresses.
Art--Collectors and collecting--France--History--18th century--Congresses.
Art--Collectors and collecting--Germany--History--18th century--Congresses.
Art--Collectors and collecting--Netherlands--History--18th century--Congresses.