Informazzjoni minn organizzazzjoni tal-arti (Verifikat minn Operabase)
Siegfried by Wagner, Richard, Ġim 11 Diċ 2020, Minn (2020/2020), Immexxi minn Valery Gergiev, George Tsypin,, Surmast Direttur Valery Gergiev, Mariinsky-2, Saint Petersburg, Russia