Chicago Grand Opera Company ended in 1914.
Chicago City Opera Company ended in 1939.
Chicago Opera Company was created in 1940.
Lithuanian Opera Company of Chicago was created in 1956.
Chicago Grand Opera Company was created in 1910.
Chicago City Opera Company was created in 1935.
Chicago Opera Association ended in 1921.
Chicago Civic Opera ended in 1931.
Berkshire Opera Company ended in 2009.
Philadelphia Opera Company ended in 1910.
Opera Company of Boston ended in 1990.
Beecham Opera Company ended in 1920.