The distinctive triangular shape of the Flatiron Building, designed by Chicago architect Daniel Burnham and built in 1902, allowed it to fill the wedge-shaped property located at the intersection of Fifth Avenue and Broadway. The building was intended to serve as offices for the George A. Fuller Company, a major Chicago contracting firm. At 22 stories and 307 feet, the Flatiron was never the city’s tallest building, but always one of its most dramatic-looking, and its popularity with photographers and artists has made it an enduring symbol of New York for more than a century. (History Channel)