Columbia subject headings:
Leonardo, da Vinci, 1452-1519--Exhibitions.
Harvard subject headings:
Drawing--Private collections--England--Windsor (Berkshire)--Exhibitions.
Elizabeth II, Queen of Great Britain, 1926---Art collections--Exhibitions.
Leonardo, da Vinci, 1452-1519--Exhibitions.
Windsor Castle. Royal Library--Exhibitions.
Princeton subject headings:
Leonardo, da Vinci, 1452-1519--Exhibitions.