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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. LibreDWG - Wikipedia

    en.wikipedia.org/wiki/LibreDWG

    GNU LibreDWG is a software library programmed in C to manage DWG computer files, native proprietary format of computer-aided design software AutoCAD. It aims to be a free software replacement for the OpenDWG libraries. The project is managed by the Free Software Foundation (FSF).

  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. File:Archimedean spiral.svg - Wikipedia

    en.wikipedia.org/wiki/File:Archimedean_spiral.svg

    You are free: to share – to copy, distribute and transmit the work; to remix – to adapt the work; Under the following conditions: attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made.

  6. 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.

  7. Staircase tower - Wikipedia

    en.wikipedia.org/wiki/Staircase_tower

    Staircase tower with no external door on the church of Saint-Pierre-ès-Liens in Rampoux (), France. A staircase tower or stair tower (German: Treppenturm, also Stiegenturm or Wendelstein) is a tower-like wing of a building with a circular or polygonal plan that contains a stairwell, usually a helical staircase.

  8. Staircase - Wikipedia

    en.wikipedia.org/wiki/Staircase

    Good lighting is important in a staircase so users see where they are going and to prevent falls. [6] There is often a window on the wall to let in daylight.In many cases, indoor stairs are placed far inside the building structure, and it is often not easy to get access to a wall on the outside where it would be natural to have a regular window for letting daylight in.

  9. History of construction - Wikipedia

    en.wikipedia.org/wiki/History_of_construction

    The oldest construction drawing is in the Temple of Apollo at Didyma. An unfinished stone wall was etched with the profiles of columns and mouldings, and the wall was never finished so the drawing was not erased: a rare glimpse into the history of working construction drawings. [2]