Getting inside William Penn's head for once a decade cleaning [photos] - WHYY
Statues around Philadelphia, Part Two – PhillyHistory Blog
Model for William Penn Statue - Encyclopedia of Greater Philadelphia
Statues around Philadelphia, Part Two – PhillyHistory Blog
A Look Back At How The Comcast Technology Center Changed The Philadelphia Skyline - Philadelphia YIMBY
Philly YIMBY Revisits the Topping-Out of the Spire atop One Liberty Place in Center City - Philadelphia YIMBY
Looking Back to the Moment When One Liberty Place Passed the Statue of William Penn Atop Philadelphia City Hall - Philadelphia YIMBY
Nothing left uncarved': A guide to the 250 sculptures on Philadelphia City Hall
Looking Back at the Construction of One Commerce Square at 2005 Market Street in Center City - Philadelphia YIMBY
Looking Back at the Originally Intended Placement of the Statue of William Penn atop City Hall - Philadelphia YIMBY
The Secret Life of Buildings: Philadelphia's Iconic City Hall - Solo Real Estate
Tour America's History: City Hall Tower Sculptures