John Wallis and the Roof of the Sheldonian Theatre:, via an @aperiodical description of a 3d print of the same structure,

It's an elegant way to build a wide roof out of short beams with no joinery. But the history is somewhat lacking: Similar structures were known much earlier to Leonardo Da Vinci, Villard de Honnecourt, and Sebastiano Serlio. See Sylvie Duvernoy, "An introduction to Leonardo's lattices",

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