Across Philadelphia, thoroughfares as old as Walnut Street and as new as Martin Luther King Drive lead us where we’re going. But, as Oscar Beisert uncovers, tucked in between them and dating back to the time of William Penn are small, pedestrian alleys and courts

Some 30 years behind Boston, Charleston, and New York, the Philadelphia’s first concert was successful enough to draw at least one quite prescient concertgoer to the second