Arizona Opera Orchestra Musicians Association was created in 2000.
Pacific Opera was created in 2003.
The Flying Opera was created in 2008.
The Threepenny Opera was created in 1928.
Opera Canada was created in 1960.
Pocket Opera was created in 1978.
Unhealthy Opera was created in 2006.
Sea Opera was created in 2009.
Fife Opera was created in 1975.
Opera Soft was created in 1987.
Paris Opera was created in 1669.
Manitoba Opera was created in 1969.