Florentine Opera
Florentine Opera
http://www.florentineopera.org/
Bayeren
Bayerische staatsoper
http://www.bayerische.staatsoper.de/c.php/index_bso.php?l=en&dom=dom1
Alden Biesen Zomeropera
Alden Biesen Zomeropera
http://www.zomeropera.be/
Greensboro Opera
Greensboro Opera
http://www.greensboroopera.org/
Int. Opera producties
Stichting internationale opera producties
http://www.operaproducties.nl/
Sirene operntheater (Wenen)
Wiener ensemble für zeitgenössisches musiktheater
http://sirene.at/
Opera company of Philadelphia
Opera company of Philadelphia
http://www.operaphilly.com/
The mobile opera
The mobile opera, mobile's oldest performing art organization.
http://www.mobileopera.org/