Columbia subject headings:
Pius II, Pope, 1405-1464--Art patronage--Congresses.
Pius II, Pope, 1405-1464--Congresses.
Siena (Italy)--Church history--Congresses.
Harvard subject headings:
Art, Renaissance--Italy--Siena--Congresses.
Pius, 1405-1464 II, Pope--Art patronage--Congresses.
Pius, 1405-1464 II, Pope--Congresses.
Siena (Italy)--Church history--Congresses.
Princeton subject headings:
Art, Renaissance--Italy--Siena--Congresses.
Pius II, Pope, 1405-1464--Art patronage--Congresses.
Pius II, Pope, 1405-1464--Congresses.
Siena (Italy)--Church history--Congresses.