Graz double spiral stairs, Double spiral staircase in Castle of Graz, Austria.
The Graz double spiral stairs is a stone structure within the castle's inner courtyard featuring two separate staircases that twist around a central axis. The spirals wind upward in opposite directions, intersecting only at landing platforms on each floor where they briefly meet before continuing their independent paths.
Emperor Frederick III ordered the construction of this staircase in 1499 as part of the castle's Gothic expansion during the 15th century. The design emerged during a period of significant architectural innovation in Central Europe, when such interlocking structures were rare and technically demanding.
The staircase reflects a design philosophy where separated paths converge at each level, creating a visual metaphor for connection. Visitors can observe how the two spirals come together at landing points before diverging again as they continue upward.
The staircase is accessible through the castle's inner courtyard, which is generally open during daylight hours with no entry fee required. Good footwear is recommended as the stone steps can be worn smooth and slippery, especially in damp conditions.
The two staircases operate as completely independent pathways, allowing two people to climb side by side in separate spirals without any visual contact until they reach a landing. This remarkable engineering solution demonstrates a clever use of space that maximized flow while maintaining the illusion of two distinct routes.
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