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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. Laurentian Library - Wikipedia

    en.wikipedia.org/wiki/Laurentian_Library

    Tribolo attempted to carry out this plan in 1550, but nothing was built. Ammannati took on the challenge of interpreting Michelangelo's ideas to the best of his abilities using a small clay model, scanty material, and Michelangelo's instructions. [3] The staircase leads up to the reading room and takes up half of the floor of the vestibule.

  4. 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.

  5. Architectural drawing - Wikipedia

    en.wikipedia.org/wiki/Architectural_drawing

    An architectural drawing or architect's drawing is a technical drawing of a building (or building project) that falls within the definition of architecture.Architectural drawings are used by architects and others for a number of purposes: to develop a design idea into a coherent proposal, to communicate ideas and concepts, to convince clients of the merits of a design, to assist a building ...

  6. Staircase - Wikipedia

    en.wikipedia.org/wiki/Staircase

    The concept of stairs is believed to be 8000 years old, and are one of the oldest buildings in architectural history. [4] The oldest example of spiral stairs dates back to the 400s BC. [5] Medieval architecture saw experimentation with many different shapes, and the Renaissance even more so with varied designs. [5]

  7. Escalator - Wikipedia

    en.wikipedia.org/wiki/Escalator

    Levytator, a design originating at City University in London, can move in straight lines or curves with or without rising or descending. The returning steps do not move underneath the in-use steps: rather, they provide steps for travel in the opposite direction, as in the Pahl spiral escalator patent. [36]

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