Columbia subject headings:
Piero, della Francesca, 1416?-1492--Criticism and interpretation--Congresses.
Harvard subject headings:
Art, Renaissance--Italy--Congresses.
Italy--Court and courtiers--Congresses.
Piero, della Francesca, 1416?-1492--Criticism and interpretation--Congresses.
Princeton subject headings:
Piero, della Francesca, 1416?-1492--Themes, motives--Conferences.