The Wiener Staatsoper is one of the most famous opera houses in the world and is known as the "opera center of the world".It is also the main symbol of Vienna. The Viennese State Opera House is one of the four largest opera houses in the world. It was built in 1861 and took eight years to complete.With a total area of 9,000 square meters, it is located on Vienna's old city Ring Road and used to be the royal Court theatre.On May 25, 2019, the State Opera House in Vienna, Austria, held a performance to commemorate its 150th anniversary.