Tallest buildings in the world
Philadelphia City Hall (1901), Singer Building (1908), Metropolitan Life Tower (1909), Woolworth Building (1913), Equitable Building (1915), Bank of Manhattan Trust Building (1930), Chrysler Building (1930), Empire State Building (1931), World Trade Center (1971), Sears Tower (1973), CN Tower (1976), Petronas Towers (1998), Taipei 101 (2004), Shanghai World Financial Center (2008), Burj Khalifa (2010), Jeddah Tower (under construction).