Completed in 1902, the elegant 21-storey Flatiron Building is shaped like a tall slice of cake. Like all tall buildings now, it has a steel frame and the external stonework functions mainly to keep out the weather rather than support the structure.
I've read that "the building created unusual eddies which would cause women's skirts to fly around as they walked on 23rd Street. This attracted throngs of young men who gathered to view the barelegged spectacle." It was calm the day we visited.