Philly's William Penn Statue Getting A Six-Week Cleaning
William Penn - Association for Public Art
City Hall's Billy Penn Undergoes Spring Cleaning
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William Penn Statue - Philadelphia, Pennsylvania
With scaffolding up, William Penn statue restoration begins - Curbed
City Hall's William Penn statue cleaning to begin in May - Curbed
City Hall's Billy Penn Undergoes Spring Cleaning
12 of Philly's most interesting historical markers
Why the statue of William Penn atop Philly's City Hall looks to