 After many of the old manufacturers and businesses left Philadelphia or shut down, the city started attracting service businesses and began to market itself more aggressively as a tourist destination.Contemporary glass-and-granite skyscrapers were built in Center City beginning in the 1980s.Historic areas such as Old City and Society Hill were renovated during the reformist mayoral era of the 1950s through the 1980s, making those areas among the most desirable neighborhoods in Center City.