Columbia subject headings:
Aqueducts--Italy--Tuscany--History--16th century.
Fountains--Italy--Tuscany--History--16th century.
Water-supply--Italy--Tuscany--History--16th century.
Harvard subject headings:
Aqueducts--Italy--Tuscany--History.
Architecture, Renaissance--Italy--Tuscany.
Fountains--Italy--Tuscany--History.
Water-supply--Italy--Tuscany--History.
Princeton subject headings: