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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. Make a spiral staircase by yourself in your backyard - AOL

    www.aol.com/spiral-staircase-yourself-backyard...

    This spiral staircase comes in a box, and you can put it together by yourself. Skip to main content. 24/7 Help. For premium support please call: 800-290-4726 more ways to ...

  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. 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.

  6. Great Mosque of Samarra - Wikipedia

    en.wikipedia.org/wiki/Great_Mosque_of_Samarra

    The minaret or tower was constructed in 848–852 of sandstone, and is unique among other minarets because of its ascending spiral conical design. 52 metres (171 ft) high and 33 metres (108 ft) wide at the base, the spiral contains stairs reaching to the top.

  7. 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 ...

  8. Hyperbolic spiral - Wikipedia

    en.wikipedia.org/wiki/Hyperbolic_spiral

    A spiral staircase in the Cathedral of St. John the Divine.Several helical curves in the staircase project to hyperbolic spirals in its photograph.. A hyperbolic spiral is a type of spiral with a pitch angle that increases with distance from its center, unlike the constant angles of logarithmic spirals or decreasing angles of Archimedean spirals.

  9. Penrose stairs - Wikipedia

    en.wikipedia.org/wiki/Penrose_stairs

    working on the design of a new picture, which featured a flight of stairs which only ever ascended or descended, depending on how you saw it. [The stairs] form a closed, circular construction, rather like a snake biting its own tail. And yet they can be drawn in correct perspective: each step higher (or lower) than the previous one.

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