Columbia subject headings:
Cosimo I, Grand-Duke of Tuscany, 1519-1574.
Florence (Italy)--Politics and government--1421-1737.
Nobility--Italy--Florence--Biography.
Tuscany (Italy)--Politics and government--1434-1737.
Harvard subject headings:
Cosimo I, Grand-Duke of Tuscany, 1519-1574
Italy--History, Military--1268-1559
Tuscany (Italy)--History, Military--16th century.
Princeton subject headings:
Cosimo I, Grand-Duke of Tuscany, 1519-1574.
Florence (Italy)--Politics and government--1421-1737.
Nobility--Italy--Florence--Biography.
Tuscany (Italy)--Politics and government--1434-1737.