choose Architecture: Brunelleschi's design of the dome for Florence's cathedral. I remember watching this on NOVA back in 2014, and was intrigued by it then too. This is a feat of modern engineering technology at a time when it shouldn’t have been possible to construct. The Florence cathedral had been constructed as an icon to the world of the power and majesty that Florence was trying to project. Unfortunately, the cathedral had been constructed but the dome to cover it had not, and was causing issues because it was open to the outside. Hence the problem of how to put a dome on the cathedral. There was a contest for the best design, and the most unlikely of individuals to win was a Goldsmith by trade, not an architect or engineer.
