A Clockmaker, an Egg, and a Cathedral

Jeanne Lazzarini tells us how a clockmaker used an egg to win the competition to build the dome of the Florence Cathedral. The Cathedral had had a huge gaping hole for a hundred years since no one knew how to build such a large dome. His solution involved the equation for a hanging chain and parallel lines that meet.

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Conversations, explorations, conjectures solved and unsolved, mathematicians and beautiful mathematics. No math background required.