This Hofburg palace, Austria rulers. From the thirteenth century until 1918, ie since the reign of Rudolf And until Charles I, the Hofburg was enlarged and changed by reigning monarchs. The dominant styles are Baroque and Classicism, which is easily seen. The thirteenth-century courtyard Swiss (ie, the oldest part of the palace) is connected to the Swiss Gate Renaissance In der Burg - the largest square, which is surrounded Alte Burg (ie old palace), Amelia palace of the sixteenth century, the Imperial Chancellery and the Baroque wing Leopold. The latter is presently the residence of the President of Austria. In the apartments of Franz Joseph and Empress Elisabeth in the Chancellery building now houses a museum and the entrance to the palace is situated on the side of St. Peter's Square. Michael, where they are exposed excavations from the times of ancient Rome. Every year, organized New Year's Eve ball is a great traditional imperial.