Just shy of the stock market crash and at the tail-end of a real estate boom of the late 1920s, a race to the top broke out between three buildings, who vied for the title of the World's Tallest Building. A clear rivalry developed between Craig Severance, architect of 40 Wall Street, and his ex-business partner, William Van Alen, who designed the Chrysler Building. Just uptown, the Empire State Building threatened to cast a shadow over its two competitors, topped off with an unlikely crown.