The story, as many of you know, is that the house of Mary and the Holy Family in Nazareth was miraculously moved by angels, first apparently to Albania or Croatia until the Muslims invaded that area. Then, on Dec.10, 1294 (if I have the story right) shepherds reported seeing a house in the sky, flying across the Adriatic, supported by angels. They saw Our Lady and the Baby Jesus seated on top of the house. The first place in Italy didn't work out, so the Aangels moved the house another time, finally to place it in Loreto, Italy. It has become a popular pilgrimage site, and I believe John Paul II visited it
No need to debate this matter, but it isn't easy for reasonable people in the 21st century to accept such a story as fact. These stories, of which there are many, make many people skeptical of various claims re Mary, miracles associated with her, her apparitions, etc.
Some may say that Catholics are not required to believe such tales. I hope not. But it is such folklore as this that makes Catholicism appear to many to be seriously infected by old superstitions.
I would not want to show any disrespect to Mary, the mother of Christ. Still, the church needs to marginalize these stories that, in my mind, undermine the the church's credibility. And I also feel that they do an injustice to Mary as well as well as to truth.