Columbia subject headings:
Piero, della Francesca, 1416?-1492--Criticism and interpretation.
Piero, della Francesca, 1416?-1492--Symbolism.
Symbolism in art.
Harvard subject headings:
Piero, della Francesca, 1416?-1492--Criticism and interpretation.
Symbolism in art.
Princeton subject headings:
Piero, della Francesca, 1416?-1492--Criticism and interpretation.
Piero, della Francesca, 1416?-1492--Symbolism.
Symbolism in art.