Columbia subject headings:
Harvard subject headings:
Municipal government--Italy--Piacenza--History--To 1500.
Municipal officials and employees--Italy--Piacenza--History--To 1500.
Piacenza (Italy)--Officials and employees.
Piacenza (Italy)--Politics and government.
Princeton subject headings:
Municipal government--Italy--Piacenza--History--To 1500.
Municipal officials and employees--Italy--Piacenza--History--To 1500.
Piacenza (Italy)--Officials and employees.
Piacenza (Italy)--Politics and government.