In 1743, a small cabin suspended by ropes was installed in a courtyard of the Palace of Versailles for the private use of King Louis XV. Manually operated by servants hidden from view, the so-called "flying chair" allowed movement between floors without stairs, and unknowingly introduced one of the central questions of modern architecture: how to move people vertically in a way that is efficient, safe, and integrated into the building.
The mechanization of this principle, with the introduction of a safety elevator in the early 1850s, paved the way for an unprecedented urban transformation. Without the elevator, the skyscrapers of Chicago and New York in the 1880s would have been unfeasible not because of structural limitations, but because of access. The elevator made it possible to build higher, and it also defined the logic of how these buildings would operate, where their cores would be placed, how their lobbies would be organized, and who could reach which spaces.
