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A portcullis (from Old French porte coleice 'sliding gate') is a heavy, vertically closing gate typically found in medieval fortifications. [1] A portcullis gate is constructed of a latticed grille , made of wood or metal or both, which slides down grooves inset within each jamb of the gateway.
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English: The portcullis design is recorded as the work of Charles Barry in 1834 and is used on many Royal commissions such as on the Great Bell ("Big Ben"). As well as wide use of the portcullis design with varied supporting emblems, this specific version with the crown has been used by HM Customs and Excise "for some centuries."
Doors, metal gates, or portcullis in the opening can be used to control entry or exit. The surface surrounding the opening may be made of simple building materials or decorated with ornamentation . The elements of a portal can include the voussoir , tympanum , an ornamented mullion or trumeau between doors, and columns with carvings of saints ...
The crowned portcullis device is ancient and is in the public domain where it originated, in the UK. However, the arrangement of the device and the text would not necessarily be in the public domain in the UK.
A short descending corridor – lined with granite [24] – leads into a vestibule, beyond which the route is guarded by a pink granite portcullis, [57] with granite-lined walls on either side. [71] The corridor is 4.25 m (14 ft) long sloped at 24° 48′, with a passage 1.27 m (4.2 ft) wide and 1.87 m (6.1 ft) high.
Granite, quarried near Aswan, was used to construct some architectural elements, including the portcullis (a type of gate) and the roofs and walls of the burial chamber. Occasionally, granite was used in the outer casing as well, such as in the Pyramid of Menkaure.
Portcullis House (PCH) is an office building in Westminster, London, England, that was commissioned in 1992 and opened in 2001 to provide offices for 213 members of the Parliament of the United Kingdom and their staff. The public entrance is on the Embankment.