Four new residential towers are transforming the West Philly skyline, changing the landscape above and altering our visual environment below. Hidden City contributor and in-house urbanist Stephen Stofka pulls out the red pen and puts them through the test

We asked for a metaphor for the form of Philadelphia. The winning idea gets to spatial patterns as well as relationships among neighborhoods and the city to the outside world

An British architect posits the egg theory of cities, but we don’t think it fits Philadelphia so we’re asking you to do better