use for more than a century, constructed as the residence of the Emperor Rudolph II in the style of the late Renaissance. Of note is the small tower with its cupola and the astronomical clock on its façade. Leopoldine Wing The connection between the Amalienburg and the Swiss Court is the Leopoldine Wing (Leopoldinischer Flügel) which was first built in the 1660s under Emperor Leopold I and thus named after him. The architect was Filiberto Lucchese, but after the Siege of 1683 by the Turks, the wing was rebuilt by Giovanni Pietro Tencala with an additional floor installed. Through its architecture, this wing still bears a connection to the Late Renaissance. It is in this wing that the offices of the Federal President are located. The Privy Council Room (Geheime Ratstube) is part of the wing. This is where Emperor Franz Joseph I held his opening speeches at the sessions of the Austro-Hungarian Delegation. Here the Archduke Franz Ferdinand, a nephew of emperor Franz Joseph I and heir to the throne, spoke the Oath of Renunciation on 28 June 1900 and in so doing renounced all claims to the throne for his descendants. A dynastically necessary act as his intended marriage was to be morganatic, due to the unequal rank between him and his future wife. The lower section of this wing as well as that of the Amalienburg served as the enormous wine cellar for the Hofburg. Imperial Chancellery Wing An additional father-son collaborative project resulted in the Winter Riding School (Winterreitschule) across from the Stallburg (and where the first Austrian parliament sat in 1848) and in the Imperial Chancellery Wing (Reichskanzleitrakt) across from the Leopoldine Wing. The latter was originally planned by Johann Lukas von Hildebrandt and accommodated, in addition to the Aulic Council (Reichshofrat), the offices of the Imperial Vice-Chancellor (Reichsvizekanzler), who was the de facto prime minister of the Holy Roman Empire since the ceremonial position of Imperial Arch-Chancellor (Reichserzkanzler)—whom the Imperial Vice Chancellor represented—had always been filled by the Archbishop of Mainz since the Middle Ages. After the end of the Holy Roman Empire, this wing housed the apartments of Napoleon, The Duke of Reichstadt and later those of Emperor Francis Joseph I. The chancellery, Swiss court, Amalienburg and Leopoldine Wing form the Inner Castle Court (innerer Burghof). In the middle is a bronze statue of Francis I dressed as a Roman emperor, by Pompeo