Pope Saint John Paul II
Pope Saint John Paul II is the only pope to have visited Philadelphia during his pontificate. He had been to Philadelphia previously while he was Archbishop of Krakow for the Eucharistic Congress and bicentennial celebration in 1976 . As pope, he visited the Cathedral of Saints Peter and Paul, addressed the seminarians of Philadelphia, and visited the tomb of Saint John Neumann in 1979.
“It gives me great pleasure to meet you here in the Cathedral of Philadelphia, for it has a deep meaning for me. Above all, it means you: the living Church of Christ, here and now, alive in faith, united in the love of Jesus Christ.” -Pope John Paul II
When Pope John Paul II was in Philadelphia, he celebrated Mass in Logan Circle, on the opposite end of the parkway from the Philadelphia Art Museum, which is where Pope Francis plans to celebrate Mass and attend the Festival of Families in his 2015 visit.*
The Morning Call: http://www.mcall.com/news/local/mc-pope-francis-visit-how-to-20141117-story.html#page=1