Austria > ViennaHistorische Panoramazeichnung des Michaelertrakts der Wiener Hofburg zwischen 1890 und 1900. Hofburg (German Hofburg) is the winter residence of the Austrian Habsburgs and the main seat of the imperial court in Vienna. In total there are 2600 halls and rooms. Some of the premises are used as the official residence of the President of Austria. A medieval castle was probably built on this site long before the Habsburgs. According to documents, it is known that already in 1279 the Austrian rulers lived in Hofburg. Medieval buildings located around the Renaissance Swiss courtyard include a 15th-century Gothic chapel. and the imperial treasury, in which the imperial kleinods of the Holy Roman Empire emperors are now exhibited.