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How does a double-helix staircase work?
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Images
Chambord Castle in the Loire Valley, France, features ornate towers and spires, with manicured gardens and a moat in the foreground. Diagram showing the double helix staircase in the Chateau de Chambord, France, with a side view illustrating two intertwined spiral staircases around a central column and an aerial view highlighting their separation, allowing people to ascend and descend without crossing paths. The double-helix stone staircase at Chateau de Chambord in France, with two people ascending separate intertwining flights beneath a vaulted, ornate ceiling. Leonardo da Vinci Chateau de Chambord in France, a large Renaissance castle with ornate towers and chimneys, reflected in the still water of a moat or canal in front.

How does a double-helix staircase work?: References & Edit History

Article Contributors

Primary Contributors

  • Steven Kapusta
    Steve Kapusta is currently a senior illustrator for Encyclopædia Britannica and has worked there since 1992.
  • René Ostberg
    René Ostberg is an associate editor at Encyclopaedia Britannica. 

Other Encyclopedia Britannica Contributors

Article History

Type Description Contributor Date
Article title updated for style. Nov 07, 2026
Reorganized media. Apr 08, 2026
New article added. Mar 22, 2024
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