Columbia subject headings:
Harvard subject headings:
Theater--Italy--History--17th century--Congresses.
Theater--Italy--History--18th century--Congresses.
Theater--Poland--History--17th century--Congresses.
Theater--Poland--History--18th century--Congresses.
Princeton subject headings:
Theater--Italy--History--17th century--Congresses.
Theater--Italy--History--18th century--Congresses.
Theater--Poland--History--17th century--Congresses.
Theater--Poland--History--18th century--Congresses.