Columbia subject headings:
Architecture, Renaissance--Italy--Rome.
City planning--Italy--Rome.
City planning--Italy.
Sixtus V, Pope, 1520-1590--Art patronage.
Harvard subject headings:
Architecture--Italy--Rome
City planning--Italy--Rome--History--16th century.
Monuments--Italy--Rome
Rome (Italy)--Buildings, structures, etc.
Rome (Italy)--History--1420-1798.
Sixtus V, Pope, 1520-1590--Art patronage.
Princeton subject headings:
Architecture, Renaissance--Italy--Rome.
Sixtus, V Pope, 1521-1591--Art patronage.