I'm curious when the Vatican approved public sightings of Mary began. The earliest I can find is 1531 AD. I believe Pope Liberius claimed to have had a personal sighting in 352 AD. Are the Marian apparitions a recent phenomenon? Marian apparitions are of apostolic origin.
http://www.marypages.com/OLVvandePilaarEng.htm
Also, the English shrine of the Blessed Virgin Mary is at a place where she appeared during the reign of St. Edward the Confessor, about 5 years before the Norman conquest.
I clicked on your link, but it doesn't give any dates for
Vatican approved sightings. I'm assuming the Vatican takes these claims very seriously and only approves of sightings it thinks were real. I'm sure we can go through history and find all kinds of individuals who claim to have seen Mary, but that's pretty hard to investigate.
Marian apparitions are of apostolic origin.
Why aren't they written about by the Apostles?