In the late 1980s and early 1990s large glass and granite skyscrapers were built in Center City. The largest skyscraper was Liberty Place. Consisting of the 945-ft (288 m) One Liberty Place, the 848-ft (258 m) Two Liberty Place and a smaller hotel, Liberty Place was the first building taller than Philadelphia's City Hall. Before construction began, the Philadelphia City Council had given permission for buildings to be taller than City Hall to encourage skyscraper development along Market Street. Liberty Place was designed by Helmut Jahn, who combined historical architecture style with post-modern style. In the case of Liberty Place, Jahn was influenced by the art deco Chrysler Building. According to the curse of Billy Penn, which appeared sometime after Liberty Place was constructed, no Philadelphia sports team would win a championship as long as there was a building taller than the statue of William Penn on top of City Hall. For a detailed description of Philadelphia's building height "wars," see Thom Nickels' 'Philadelphia Architecture,' published in 2005.