Footprints of Jesus?

View of a copy of a stone that is said to bear two footprints of Jesus in the Quo Vadis church that is located on the via Appia.  The footprints are horizontal, but are difficult to detect. The official name of the church is Church of St. Mary in Palmis" where "palmis" refers to the footprints of Jesus.  The original stone is in the nearby Basilica of San Sebastiano.

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Tradition suggests that Peter was fleeing from persecution in Rome and that here he met Jesus who was going into the city of Rome.  Peter asked Jesus Domine Quo Vadis ("where are you going Lord?").  Jesus responded "I am going to Rome to be crucified again," and Peter was shamed into returning to Rome to martyrdom.