Centered in the heart of downtown Philadelphia stands the nation's largest municipal building (larger than the U.S. Capitol), serving the city's government and politics for over 100 years. It is situated in the exact geographical center of William Penn's original 1682 plans for the city, now known as the intersections of Broad and Market Streets, Center Square.

Controversy has surrounded this National Historic Landmark from its earliest conception in 1860 to present day. Yet, it has also earned a great deal of respect as a unique architectural and sculptural achievement. City Hall includes some 700 rooms and more than 250 architectural reliefs and freestanding sculptures, including its most famous bronze William Penn statue topping the clock tower.