Brunelleschi won the job to build this huge span, widest since the Pantheon, by telling the judges to choose the contestant who could make an egg stand up on a table. Everyone’s eggs toppled except for Brunelleschi’s which he gently tapped until it was blunt enough to stand on its end. His solution to replicating the egg shape for a dome was huge stone ribs branching from lantern to drum kept from springing apart by stone chains raised into the vault by machinery he invented.

The entire suite is available as well. This is a Archival Pigment Print on archival hot press rag.