Columbia subject headings:
Art, Renaissance--Italy--Milan.
Artists--Italy--Biography.
Leonardo, da Vinci, 1452-1519.
Milan (Italy)--Buildings, structures, etc.
Scientists--Italy--Biography.
Harvard subject headings:
Art, Renaissance--Italy--Milan.
Artists--Italy--Biography.
Leonardo, da Vinci, 1452-1519
Milan (Italy)--Buildings, structures, etc.
Scientists--Italy--Biography
Princeton subject headings:
Art, Renaissance--Italy--Milan.
Artists--Italy--Biography.
Leonardo, da Vinci, 1452-1519.
Milan (Italy)--Buildings, structures, etc.
Scientists--Italy--Biography.