Columbia subject headings:
Architecture, Renaissance.
Architecture--Italy--Rome.
Nicholas V, Pope, 1397-1455.
Palaces--Italy--Rome.
Harvard subject headings:
Architecture, Renaissance.
Architecture--Italy--Rome
Nicolaus V, Pope, -1455.
Palaces--Italy--Rome
Palaces--Italy--Rome.
Princeton subject headings:
Architecture, Renaissance.
Architecture--Italy--Rome.
Nicolaus V, Pope, d. 1455.
Palaces--Italy--Rome.