Vienna State Opera House marks 150th anniversary

Photo taken on May 25, 2019 shows the exterior of Vienna State Opera House, in Vienna, Austria. Vienna State Opera House held a special program on Saturday to pay tribute to the 150th anniversary of the house and its artists. The Vienna State Opera House is one of the most famous opera houses in the world which was opened on May 25, 1869. (Xinhua/Guo Chen)