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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 ...
The spiral stair itself was carved out of 19 blocks, with a full turn every 14 steps; this arrangement required a more complex geometry than the more usual alternatives of 12 or 16. [29] The quality of the craftsmanship was such that the staircase is practically even, and the joints between the huge blocks still fit accurately. [30]
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.
The longest stone stairs in Japan are the 3,333-step stairs of the Shakain temple in Yatsushiro, Kumamoto. [52] The second ones, Mount Haguro stone stairs, have 2,446 steps in Tsuruoka, Yamagata. The CN Tower's staircase reaches the main deck level after 1,776 steps and the Sky Pod above after 2,579 steps; it is the tallest metal staircase on ...
Loretto Chapel is best known for its helix-shaped staircase (nicknamed "Miraculous Stair"), which rises 20 feet (6.1 m) to the choir loft while making two full turns, all without the support of a newel or central pole. The staircase is built mostly out of wood and is held together by wooden pegs, with no glue, nails or other hardware used.
The 125-foot-tall (38 m) column stands atop 600-foot (180 m) Coxcomb Hill and includes an interior spiral staircase that leads to an observation deck at the top. [3] The spiral sgraffito frieze on the exterior of the structure has a width of nearly seven feet (2.1 m) and a length of 525 feet (160 m). [3]
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