Vienna Opera House (Detail)AlbertinaplatzHofburg/JosefsplatzThe Michaelertor is the "backdoor" of the Hofburg, the former residence of the emperor.The Michaelertor is accompanied by two fountains. This is the one nearer Augustinerstraße.The Looshaus, constructed in 1909 by architect Adolf Loos, is one of the beacons of the Wiener Moderne, or Viennese Modern Age.