(Credit: Michael Pöhn/Wiener Staatsoper) The DG stage has announced it will stream “Tosca” from the Wiener Staatsoper. The production, which was filmed on Dec. 13, will be streamed on March 12 and features the legendary production by Margarethe Wallmann. Anna Netrebko stars in the title role alongside Yusif Eyvazov as Cavaradossi and Wolfgang Koch as Scarpia. The production also showcases {…}