Question: The entrance to the palace which houses the imperial sword is called what?

<P0-S0> The Imperial Treasury (German: "Kaiserliche Schatzkammer" ) at the Hofburg Palace in Vienna, Austria contains a valuable collection of secular and ecclesiastical treasures covering over a thousand years of European history. <P0-S1>  The Imperial Treasury is affiliated with the Kunsthistorisches Museum, and houses in 21 rooms a collection of rare treasures that were compiled by the Imperial House of Habsburg over the course of centuries, including the Imperial Crown, Orb, and Sceptre of Austria, and the Imperial Regalia of the Emperors and Kings of the Holy Roman Empire, including the Imperial Crown of the Holy Roman Empire. <P0-S2>  The entrance to the treasury is at the Schweizerhof (Swiss Courtyard), the oldest part of the palace, which was rebuilt in the sixteenth century in the Renaissance style under Holy Roman Emperor Ferdinand I. <SEP> <P1-S0> 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. <P1-S1>  The most important parts are the Imperial Crown, the Holy Lance and the Imperial Sword. <P1-S2>  Today they are kept at the Imperial Treasury in the Hofburg palace in Vienna, Austria. <SEP> <P2-S0> The Private Apartments of the Winter Palace are sited on the piano nobile of the western wing of the former imperial palace, the Winter Palace in St Petersburg. <P2-S1>  Access to the private rooms, for members of the Imperial Family, from the exterior was usually through the Saltykov Entrance ("centre in the photograph to the right") which was reserved for use by only the Tsar, Tsaritsa and grand dukes and grand duchesses. <P2-S2>  A second access was through a discrete box-like porch, on the western end of the Palace's Neva façade. <P2-S3>  From the ground floor, it can be accessed from the October Staircase, formerly known as His Majesty's Own Staircase; this double-flighted imperial staircase was a secondary entrance to the private apartments, and provided a more convenient route to the palace's ground floor and private entrances than the more formal and ceremonial public route through the state apartments. <P2-S4>  During the October Revolution of 1917, this was the entrance by which the revolutionaries gained access to the palace in order to arrest the Provisional Government in the small private dining room. <P2-S5>  Since that date it has been known as the October Staircase and has a plaque commemorating the event. <P2-S6>  Despite its size and grandeur, the October Staircase was a secondary staircase, the Jordan Staircase being the principal. <SEP> <P3-S0> Temple Bar was the principal ceremonial entrance to the City of London on its western side from the City of Westminster. <P3-S1>  It is situated on the historic royal ceremonial route from the Tower of London to the Palace of Westminster, the two chief residences of the mediaeval English monarchs, and from the Palace of Westminster to St Paul's Cathedral. <P3-S2>  The road east of Temple Bar and within the City is Fleet Street, the road to the west, in Westminster, is The Strand. <P3-S3>  At Temple Bar the Corporation of the City of London formerly erected a barrier to regulate trade into the City. <P3-S4>  The 19th century Royal Courts of Justice are located next to it on its north side, having been moved from Westminster Hall. <P3-S5>  To its south is the Temple Church and the Inner Temple and Middle Temple Inns of Court. <P3-S6>  As the most important entrance to the City of London from Westminster, it was formerly long the custom for the monarch to halt at Temple Bar before entering the City of London, in order for the Lord Mayor to offer the Corporation's pearl-encrusted Sword of State as a token of loyalty. <P3-S7>  The term "Temple Bar" strictly refers to a notional bar or barrier across the route, but is commonly used to refer to the 17th-century ornamental Baroque arched gateway designed by Christopher Wren which spanned the road until its removal in 1878. <P3-S8>  Wren's arch was preserved and was re-erected in 2004 in the City, in Paternoster Square next to St Paul's Cathedral.