Are any of these actually cathedrals? I see some monasteries and sacred sites, I don't see any cathedrals in that list. The difference is that 7 cathedrals, all named after St. Michael, found in a basically straight line would certainly not be a coincidence. It would be like there being 7 Google complexes in a straight line spread around the world: something's going on here. But 7 random religious sites named after o…
(i. e. Mont Saint Michele the bishop who saw St. Michael originally refused to construct the shrine because he wasn't sure of the veracity of the vision. It was only after he was wounded by St. Michael's sword and the wound refused to heal that he went to establish the shrine. And only then did the wound closed up.)
Make of that what you will.