Columbia subject headings:
Leonardo, da Vinci, 1452-1519. Monochrome.
Mural painting and decoration--Conservation and restoration--Italy--Milan.
Sala delle asse (Castello sforzesco)
Harvard subject headings:
Leonardo, da Vinci, 1452-1519--Criticism and interpretation.
Monochrome drawing--Conservation and restoration--Italy--Milan.
Mural painting and decoration, Italian--Italy--Milan--15th century.
Sala delle asse (Castello sforzesco)
Unfinished works of art.
Princeton subject headings:
Leonardo, da Vinci, 1452-1519. Monochrome.
Mural painting and decoration--Conservation and restoration--Italy--Milan.
Sala delle asse (Castello sforzesco)