Fascinating article. I had no idea…
"According to tradition, St. Michael the Archangel appeared to an Italian bishop in 493 and consecrated a nearby cave. This became known as the Sanctuary of Monte Sant’Angelo sul Gargano, more commonly referred to as Monte Gargano. It is one of the oldest shrines dedicated to St. Michael and was the center of Christian pilgrimages.
St. Michael said to the bishop, “I am the archangel Michael, and I have chosen to dwell in that place on earth and to keep it safe.” When they arrived to consecrate the cave, St. Michael said, “It is not necessary that you dedicate this church that I myself have consecrated with my presence.”
A legend says that one of the stones contains St. Michael’s footprint."