[Buckeye McFrog]

Incorrect perception. Catholicism doesn’t claim any knowledge of where and when.

Though it has been implied that the Church came into such knowledge through one of the reported apparitions of the Virgin Mary (though it is not biblical, and hence one assumes that again some clergy have put that out there in the name of self-promotion)

[wolfman23601]

The clergy, I believe, are free to offer their theories, but there is no canonic dogma on the matter.