The largest city in Pennsylvania and the sixth most populous in the country, Philadelphia is bursting with history and diversity. From Independence Hall, built in the eighteenth century and the cradle of the American Revolution, to the Comcast Center, announced as the city’s tallest building in 2007, Philadelphia is as unique as its buildings. Center City is home to offices and skyscrapers but is also comprised of a number of distinct neighborhoods, of which, Rittenhouse Square, Washington Square West, Society Hill, Old City, and the Graduate Hospital are some of the most exciting.