University of North Texas College of Music Opera was created in 1944.
Pacific Opera was created in 2003.
The Flying Opera was created in 2008.
The Threepenny Opera was created in 1928.
Germania - opera - was created in 1902.
Fantasio - opera - was created in 1872.
Transformations - opera - was created in 1973.
Gwendoline - opera - was created in 1886.
Satyagraha - opera - was created in 1980.
Chelsea Opera was created in 2004.
Aurora - opera - was created in 1908.
Fortunio - opera - was created in 1907.