Columbia subject headings:
Harvard subject headings:
Borgia, Cesare, 1476?-1507--Exhibitions.
Leonardo, da Vinci, 1452-1519--Homes and haunts--Italy--Emilia-Romagna--Exhibitions.
Leonardo, da Vinci, 1452-1519--Knowledge--Military art and science--Exhibitions.
Princeton subject headings:
Borgia, Cesare, 1476?-1507--Exhibitions.
Italy--Description and travel--Exhibitions.
Leonardo, da Vinci, 1452-1519--Exhibitions.