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Penrose stairs. The Penrose stairs or Penrose steps, also dubbed the impossible staircase, is an impossible object created by Oscar Reutersvärd in 1937 [1][2][3][4] and later independently discovered and made popular by Lionel Penrose and his son Roger Penrose. [5] A variation on the Penrose triangle, it is a two-dimensional depiction of a ...
The Necker cube is an optical illusion that was first published as a rhomboid in 1832 by Swiss crystallographer Louis Albert Necker. [1] It is a simple wire-frame, two dimensional drawing of a cube with no visual cues as to its orientation, so it can be interpreted to have either the lower-left or the upper-right square as its front side.
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 ...
A stair flight is a run of stairs or steps between landings. A stairwell is a compartment extending vertically through a building in which stairs are placed. A stair hall is the stairs, landings, hallways, or other portions of the public hall through which it is necessary to pass when going from the entrance floor to the other floors of a building.
Ascending and Descending is a lithograph print by the Dutch artist M. C. Escher first printed in March 1960. The original print measures 14 in × 111⁄4 in (35.6 cm × 28.6 cm). The lithograph depicts a large building roofed by a never-ending staircase. Two lines of identically dressed men appear on the staircase, one line ascending while the ...
It received the name from its snake-like, curving shape. A central bridge divides the lake into two parts and defines the boundaries between Hyde Park and Kensington Gardens. [2] Among Castle Howard's gardens is a large, formal path behind the building, where a serpentine path is situated on a ridge. The serpentine path serves as a connection ...
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Grand Staircase of the. Titanic. Contemporary drawing of the "Main Staircase" contained in the Olympic & Titanic promotional joint brochure, first published in 1911. No actual photos of Titanic ' s Grand Staircase are known to exist. The set of large ornate staircases in the first-class section of the Titanic, and RMS Olympic ; sometimes ...