The entrance to the palace which houses the imperial sword is called what?
Imperial Regalia The Imperial Regalia, also Imperial Insignia, (in German "Reichskleinodien", "Reichsinsignien" or "Reichsschatz") are the regalia of the Emperors and Kings of the Holy Roman Empire. The most important parts are the Imperial Crown, the Holy Lance and the Imperial Sword. Today they are kept at the Imperial Treasury in the Hofburg palace in Vienna, Austria.
Chrysotriklinos The Chrysotriklinos (Greek: Χρυσοτρίκλινος , "golden reception hall", cf. "triclinium"), Latinized as Chrysotriclinus or Chrysotriclinium, was the main reception and ceremonial hall of the Great Palace of Constantinople from its construction, in the late 6th century, until the 10th century. Its appearance is known only through literary descriptions, chiefly the 10th-century "De Ceremoniis", a collection of imperial ceremonies, but, as the chief symbol of imperial power, it inspired the construction of Charlemagne's Palatine Chapel in Aachen.