Santuario di San Michele

Lonely Planet review

Look for the 17th-century pilgrims' graffiti as you descend the steps. St Michael is said to have left a footprint in stone inside the grotto, so it became customary for pilgrims to carve outlines of their feet and hands. Etched Byzantine bronze and silver doors, cast in Constantinople in 1076, open into the grotto itself. Inside, a 16th-century statue of the archangel covers the site of St Michael's footprint.