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

Context articles: Private Apartments of the Winter Palace
Kyoto Imperial Palace
Temple Bar, London
Imperial Regalia
Kusanagi
Sword of Osman
Imperial Sword
Imperial Treasury, Vienna
Old Summer Palace
Imperial Regalia of Brazil

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.
 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.
 A second access was through a discrete box-like porch, on the western end of the Palace's Neva façade.
 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.
 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.
 Since that date it has been known as the October Staircase and has a plaque commemorating the event.
 Despite its size and grandeur, the October Staircase was a secondary staircase, the Jordan Staircase being the principal.
The Kyoto Imperial Palace (京都御所 , Kyoto-gosho" ) is the former ruling palace of the Emperor of Japan.
 The Emperors have since resided at the Tokyo Imperial Palace after the Meiji Restoration in 1869, and the preservation of the Kyoto Imperial Palace was ordered in 1877.
 Today, the grounds are open to the public, and the Imperial Household Agency hosts public tours of the buildings several times a day.
Temple Bar was the principal ceremonial entrance to the City of London on its western side from the City of Westminster.
 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.
 The road east of Temple Bar and within the City is Fleet Street, the road to the west, in Westminster, is The Strand.
 At Temple Bar the Corporation of the City of London formerly erected a barrier to regulate trade into the City.
 The 19th century Royal Courts of Justice are located next to it on its north side, having been moved from Westminster Hall.
 To its south is the Temple Church and the Inner Temple and Middle Temple Inns of Court.
 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.
 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.
 Wren's arch was preserved and was re-erected in 2004 in the City, in Paternoster Square next to St Paul's Cathedral.
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.
Kusanagi-no-Tsurugi (草薙の剣 ) is a legendary Japanese sword and one of three Imperial Regalia of Japan.
 It was originally called Ame-no-Murakumo-no-Tsurugi (天叢雲剣 , "Heavenly Sword of Gathering Clouds") , but its name was later changed to the more popular "Kusanagi-no-Tsurugi" ("Grass-Cutting Sword").
 In folklore, the sword represents the virtue of valor.
The Sword of Osman (Ottoman Turkish: "Taklid-i Seyf"‎ ; Turkish: "Osman'ın Kılıcı" ) was an important sword of state used during the enthronement ceremony (Turkish: 'Kılıç alayı' ) of the sultans of the Ottoman Empire.
 The sword was named after Osman I, founder of the Ottoman Dynasty.
 The practice started when Osman I was girt with the sword of Islam by his mentor and father-in-law Sheikh Edebali.
 The girding of the sword of Osman was a vital ceremony which took place within two weeks of a sultan's ascension to the throne.
 It was held at the tomb complex at Eyüp, on the Golden Horn waterway in the capital Constantinople.
 Even though the journey from Topkapı Palace (where the sultan resided) to the Golden Horn was short, the sultan would board a boat amid much pomp to go there.
 The Eyüp tomb complex was built by Mehmed II in honour of Abu Ayyub al-Ansari, a companion of Muhammad who had died during the first Muslim siege of Constantinople in the 7th century.
 The sword girding thus occurred on what was regarded as sacred grounds, and linked the newly enthroned sultan both to his 13th-century ancestors and to Muhammad himself.
The Imperial Sword (German: "Reichsschwert" ) is one of the four most important parts of the Imperial Regalia ("Reichskleinodien") of the Holy Roman Empire.
 During a coronation, it was given to the emperor along with the Imperial Crown ("Reichskrone"), Imperial Sceptre ("Reichszepter"), and the Imperial Orb ("Reichsapfel").
 All four parts of the Imperial Regalia are displayed in the Imperial Treasury at the Hofburg Palace in Vienna, Austria.
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.
 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.
 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.
The Old Summer Palace, known in Chinese as Yuanming Yuan (), and originally called the Imperial Gardens (), was a complex of palaces and gardens in present-day Haidian District, Beijing, China.
 It is located 8 km northwest of the walls of the former Imperial City section of Beijing.
 Constructed throughout the 18th and early 19th centuries, the Old Summer Palace was the main imperial residence of Qianlong Emperor of the Qing dynasty and his successors, and where they handled state affairs; the Forbidden City was used for formal ceremonies.
 Widely conceived as the pinnacle work of Chinese imperial garden and palace design, the Old Summer Palace was an architectural wonder, known for its extensive collection of garden, its building architecture and numerous art and historical treasures.
 It was reputed as the "Garden of Gardens" () in its heyday.
The Imperial Regalia of Brazil consists of the Imperial Crowns: the Crown of Pedro II and the Crown of Pedro I; the Imperial Sceptre; the Imperial Orb; the Imperial Sword; and jewelry belonging to the Emperors and Empresses of Brazil.
 They were used until the abolition of the Brazilian monarchy in 1889.
 Most of the jewels have been displayed at the Imperial Museum of Brazil in Petrópolis and at the National Museum of Brazil in Rio de Janeiro since 1943.
 Other items are stored at the National Treasury in Brasília.