Beecham Opera Company ended in 1920.
Beecham - pharmaceutical company - was created in 1859.
Beecham's Pills was created in 1842.
Century Opera Company was created in 1913.
Philadelphia Opera Company was created in 1938.
Boston Opera Company was created in 1908.
Canadian Opera Company was created in 1950.
Chicago Opera Company was created in 1940.
Berkshire Opera Company was created in 1962.
Aborn Opera Company was created in 1895.
American Opera Company was created in 1937.
Knoxville Opera Company was created in 1978.