Columbia subject headings:
Power (Social sciences)--Italy--Tuscany--Congresses.
Tuscany (Italy)--Politics and government--1434-1737--Congresses.
Tuscany (Italy)--Politics and government--To 1434--Congresses.
Harvard subject headings:
Central-local government relations--Italy--Tuscany--History--Congresses.
City-states--Italy--Tuscany--History--Congresses.
Power (Social sciences)--Italy--Tuscany--History--Congresses.
Tuscany (Italy)--Politics and government--Congresses.
Princeton subject headings:
Power (Social sciences)--Italy--Tuscany--Congresses.
Tuscany (Italy)--Politics and government--1434-1737--Congresses.
Tuscany (Italy)--Politics and government--To 1434--Congresses.