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  2. List of ancient spiral stairs - Wikipedia

    en.wikipedia.org/wiki/List_of_ancient_spiral_stairs

    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 ...

  3. Escalator - Wikipedia

    en.wikipedia.org/wiki/Escalator

    This was the first of at least four escalator-style patents issued to Souder, including two for spiral designs. [3] On March 15, 1892, Jesse W. Reno patented the "Endless Conveyor or Elevator." [4] A few months after Reno's patent was approved, George A. Wheeler patented his ideas for a more recognizable moving staircase, though it was never ...

  4. Stairs - Wikipedia

    en.wikipedia.org/wiki/Stairs

    A staircase or stairway is one or more flights of stairs leading from one floor to another, and includes landings, newel posts, handrails, balustrades, and additional parts. [4] In buildings, stairs is a term applied to a complete flight of steps between two floors. A stair flight is a run of stairs or steps

  5. Penrose stairs - Wikipedia

    en.wikipedia.org/wiki/Penrose_stairs

    He did not realize that his figure was a continuous flight of stairs while drawing, but the process enabled him to trace his increasingly complex designs step by step. When M.C. Escher's Ascending and Descending was sent to Reutersvärd in 1961, he was impressed but didn't like the irregularities of the stairs ( 2 × 15 + 2 × 9 ).

  6. Loretto Chapel - Wikipedia

    en.wikipedia.org/wiki/Loretto_Chapel

    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]

  7. Bramante Staircase - Wikipedia

    en.wikipedia.org/wiki/Bramante_Staircase

    The modern 'Bramante' spiral stairs of the Vatican Museums, designed by Giuseppe Momo in 1932 The modern double helix staircase, also in the Pio-Clementine Museum, and commonly referred to as the "Bramante Staircase", was designed by Giuseppe Momo, sculpted by Antonio Maraini and realized by the Ferdinando Marinelli Artistic Foundry in 1932 and was inspired by the original Bramante Staircase.

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