Madison Square is a six acre (24,000 m²) public park in the New York City borough of Manhattan, named for James Madison, fourth President of the United States and co-author of the United States Constitution. The park is bounded by Madison Avenue (which starts at the park's southeast corner), 23rd Street, 26th Street, Fifth Avenue, and a diagonal section of Broadway. Immediately southwest of the park is the Flatiron Building, one of the oldest of the original New York skyscrapers, and just to its east is the Metropolitan Life Insurance Company Tower at 1 Madison Avenue (1909), the tallest building in the world until 1913, when the Woolworth Building was completed. The park is operated and maintained by the New York City Department of Parks and Recreation.