Tracing The 'Chinese Wall' In Center City

Center City's highrise corridor is, relative to Philadelphia's 17th century origins, very young. Shadowbat turns back pages and goes underground to find the Pennsylvania Railroad's "Chinese Wall" foundations between Broad Street and 30th Street Station

Walking the Great Wall of China: How did Dong Yao-hui cover it all?

Center City, 15th & Filbert - Old Images of Philadelphia

25 Must-See Buildings in China

Great Wall of China Slide – Beijing, China - Atlas Obscura

Digital technologies help revitalize ancient city wall in NW China_我苏网

Great Wall of China hoax - Wikipedia

Great Wall of China – Travel guide at Wikivoyage

Old Images of Philadelphia - A section of the Chinese Wall can be seen in this photograph, looking northwest from 15th & Market Streets in 1927.

Xi'an City Wall: From military site to unusual park

Story of cities #5: Benin City, the mighty medieval capital now lost without trace, Cities