Chicago Opera Association ended in 1921.
Nashville Opera Association was created in 1981.
Chicago Opera Company was created in 1940.
Chicago Opera House was created in 1885.
Chicago Civic Opera was created in 1922.
Chicago Opera Theater was created in 1974.
Lyric Opera of Chicago was created in 1929.
Florida Grand Opera Musicians Association was created in 2000.
Arizona Opera Orchestra Musicians Association was created in 2000.
Lithuanian Opera Company of Chicago was created in 1956.
Chicago City Opera Company was created in 1935.
Chicago Grand Opera Company was created in 1910.