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Download QR code; In other projects ... You are free: to share – to copy ... گزیدن نگاره برگزیده/City Hall, London, Spiral Staircase - 1.jpg ...
The spiral stair is a type of stairway which, due to its complex helical structure, has been introduced relatively late into architecture. Although the oldest example dates back to the 5th century BC, [ 1 ] it was only in the wake of the influential design of the Trajan's Column that this space-saving new type permanently caught hold in ancient ...
The double-spiral staircase One of the architectural highlights is the spectacular open double-spiral staircase that is the centrepiece of the château. [ 1 ] The two spirals ascend the three floors without ever meeting, illuminated from above by a sort of light house at the highest point of the château.
Two large double doors on the east wall opened to the first floor assembly hall of the lower court, known as the "Great Hall". Two doors, one on the North wall, and another on the South opened to the landing of two spiral staircases, one in the Northwest corner, and the other in the Southwest corner which led all the way to the attic.
Transom windows which could be opened to provide cross-ventilation while maintaining security and privacy (due to their small size and height above floor level) were a common feature of apartments, homes, office buildings, schools, and other buildings before central air conditioning and heating became common beginning in the early-to-mid 20th century.
To do this PHOOEY made an inventory of materials and items removed from the project. All the removed windows were repositioned to create a three-storey window-wall which also acts as a light-well to the new basement level. [8] In front of the window wall in the centre of the new spiral staircase, hangs a chandelier made of the original stair parts.
The chapel was commissioned by the Sisters of Loretto for their girls' school, Loretto Academy, in 1873. Archbishop Jean-Baptiste Lamy had brought in two French architects, Antoine Mouly and his son Projectus, to work on the St. Francis Cathedral project, and suggested that the Sisters could make use of their services on the side to build a much-needed chapel for the academy. [4]
In the length the building had a stair which rose 3.10 m to reach a platform before the door of the main hall of the keep. Above the bottom of the stairs, there was a small barrel vault, which supported a space from which the portcullis could be operated. [7] The gatehouse formed part of the first wall which surrounded the keep.