number of supertall skyscrapers. The Statue of Liberty rests on a pedestal on Liberty Island, an exclave of Manhattan, and part of Ellis Island is also an exclave of Manhattan. The borough has many energy-efficient, environmentally friendly office buildings, such as the Hearst Tower, the rebuilt 7 World Trade Center, and the Bank of America Tower—the first skyscraper designed to attain a Platinum LEED Certification. Architectural history The skyscraper, which has shaped Manhattan's distinctive skyline, has been closely associated with New York City's identity since the end of the 19th century. From 1890 to 1973, the title of world's tallest building resided continually in Manhattan (with a gap between 1894 and 1908, when the title was held by Philadelphia City Hall), with eight different buildings holding the title. The New York World Building on Park Row, was the first to take the title in 1890, standing until 1955, when it was demolished to construct a new ramp to the Brooklyn Bridge. The nearby Park Row Building, with its 29 stories standing high, became the world's tallest office building when it opened in 1899. The 41-story Singer Building, constructed in 1908 as the headquarters of the eponymous sewing machine manufacturer, stood high until 1967, when it became the tallest building ever demolished. The Metropolitan Life Insurance Company Tower, standing at the foot of Madison Avenue, wrested the title in 1909, with a tower reminiscent of St Mark's Campanile in Venice. The Woolworth Building, and its distinctive Gothic architecture, took the title in 1913, topping off at . Structures such as the Equitable Building of 1915, which rises vertically forty stories from the sidewalk, prompted the passage of the 1916 Zoning Resolution, requiring new buildings to contain setbacks withdrawing progressively at a defined angle from the street as they rose, in order to preserve a view of the sky at street level. The Roaring Twenties saw a race to the sky, with three separate buildings pursuing the world's tallest title in the span of a year. As the stock market soared in the days before the Wall Street Crash of 1929, two developers publicly competed for the crown. At , 40 Wall Street, completed in May 1930 in only eleven months as the headquarters of the Bank of Manhattan, seemed to have secured the title. At Lexington Avenue and 42nd Street, auto executive Walter Chrysler and his architect William Van Alen developed