Domes of the world — 1,600 years of span at the same scale (3D)

About this app

Pantheon, Hagia Sophia, Florence Cathedral, St Peter's, Taj Mahal and St Paul's as sections at the same scale: side by side, overlaid or one at a time, with a person for scale. The span has hardly grown since the Pantheon; progress lies in construction and height. The Forces switch shows compression, hoop tension, thrust and what resists it.

Subject: World heritage & building history

More from World heritage & building history

• Forum Romanum — 2,600 years of time layers (3D)
• Hagia Sophia — four lives (3D)
• Parthenon — the invisible curves (3D)
• St Peter's and the Vatican — 120 years of competing plans (3D)
• Urban fabric — figure-ground plans compared
• Taj Mahal — grid, symmetry, light (3D)

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