John Wallis and the Roof of the Sheldonian Theatre: soue.org.uk/souenews/issue4/wa, via an @aperiodical description of a 3d print of the same structure, aperiodical.com/2019/11/my-adv

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", doi.org/10.1007/978-3-7643-872

A Mastodon instance for maths people. The kind of people who make $$\pi z^2 \times a$$ jokes. Use $$ and $$ for inline LaTeX, and $ and $ for display mode.