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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. Penrose stairs - Wikipedia

    en.wikipedia.org/wiki/Penrose_stairs

    In the real world, the hero should always be in front of the villain throughout this chase. However, in the case of the Penrose stairs the hero descends another flight of stairs to catch up to the antagonist and catch him unaware. [14] The cover of the 2011 album Angles by American rock band The Strokes depicts a complex set of Penrose stairs.

  4. 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.

  5. 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]

  6. List of optical illusions - Wikipedia

    en.wikipedia.org/wiki/List_of_optical_illusions

    The Penrose stairs were created by Lionel Penrose and his son Roger Penrose. [3] A variation on the Penrose triangle , it is a two-dimensional depiction of a staircase in which the stairs make four 90-degree turns as they ascend or descend yet form a continuous loop, so that a person could climb them forever and never get any higher.

  7. Transom (architecture) - Wikipedia

    en.wikipedia.org/wiki/Transom_(architecture)

    In architecture, a transom is a transverse horizontal structural beam or bar, or a crosspiece separating a door from a window above it. This contrasts with a mullion, a vertical structural member. [1] Transom or transom window is also the customary U.S. word used for a transom light, the window over this crosspiece.

  8. Schroeder stairs - Wikipedia

    en.wikipedia.org/wiki/Schroeder_stairs

    Schroeder stairs can be perceived in two ways, depending on whether the viewer considers A or B to be the closer wall. Schroeder stairs (Schröder's stairs) is an optical illusion which is a two-dimensional drawing which may be perceived either as a drawing of a staircase leading from left to right downwards or the same staircase only turned upside down, a classical example of perspective ...

  9. Trajan's Column - Wikipedia

    en.wikipedia.org/wiki/Trajan's_Column

    Inside the shaft, a spiral staircase of 185 steps provides access to a viewing deck at the top. The capital block of Trajan's Column weighs 53.3 tons, and had to be lifted to a height of about 34 metres (112 feet). [3] Ancient coins indicate preliminary plans to top the column with a statue of a bird, probably an eagle. [4]