Columbia subject headings:
Art, Italian--Italy--Rome--16th century--Congresses.
Gregory XIII, Pope, 1502-1585--Art patronage--Congresses.
Harvard subject headings:
Art, High Renaissance--Italy--Rome--Congresses.
Art, Italian--Italy--Rome--16th century--Congresses.
Gregory XIII, Pope, 1502-1585--Art patronage--Congresses.
Science--Italy--Rome--History--16th century--Congresses.
Princeton subject headings:
Art, Italian--Italy--Rome--16th century--Congresses.
Gregory XIII, Pope, 1502-1585--Art patronage--Congresses.