Chicago City Opera Company ended in 1939.
Chicago Grand Opera Company ended in 1914.
Chicago Opera Company was created in 1940.
Chicago City Opera Company was created in 1935.
Lithuanian Opera Company of Chicago was created in 1956.
Chicago Grand Opera Company was created in 1910.
Chicago Opera Association ended in 1921.
Chicago Civic Opera ended in 1931.
American Opera Company ended in 1930.
Philadelphia Opera Company ended in 1910.
Berkshire Opera Company ended in 2009.
Beecham Opera Company ended in 1920.