Who was the architect of the Flatiron Building?

Detailed answer

The Flatiron Building was designed by renowned American architect Daniel Burnham, who was a prominent figure in the development of the skyscraper. Burnham's design for the Flatiron Building was influenced by his earlier work on the Reliance Building in Chicago, and it featured a distinctive triangular shape that was designed to maximize the use of the building's irregularly-shaped lot. The building's design was also notable for its use of a steel frame, which allowed for the creation of larger, more open floor plans and helped to establish the Flatiron Building as a pioneering example of modern skyscraper design.