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 Company ended in 1946.
Chicago City Opera Company ended in 1939.
Chicago Grand Opera Company ended in 1914.
Chicago Opera Theater was created in 1974.
Chicago Opera House was created in 1885.
Chicago Opera Association was created in 1915.
Lyric Opera of Chicago was created in 1929.
Chicago Civic Opera was created in 1922.
Canadian Opera Company was created in 1950.