Footage of the phenomenon, which worshippers have described as a 'miracle', was recently shared online.
The pontiff's intervention came in response to the case of a woman who is under investigation for allegedly faking 'miracles'.
A chalk drawing of the Virgin Mary has mysteriously reappeared 13 years after it had faded away.
Hundreds of people have been flocking to Argentina to witness what some are calling a modern miracle.
The Vatican is set to rule on the validity of a long history of Virgin Mary sightings in Bosnia.
A luminescent statue of the Virgin Mary has been attracting huge crowds of people on a daily basis.
Crowds of people have flocked to a small town in Israel to catch a glimpse of the weeping statue.
Hundreds of Catholics have gathered outside a hospital in Malaysia after the image appeared in a window.
Workers at a construction site in England believe they've seen the Virgin Mary in a satellite image.
Visitors to a religious book lending library in Ohio believe a statue of the Virgin Mary is crying.
In the small village of Medjugorje in Bosnia-Hercegovina the Virgin Mary has reportedly appeared every day.
A tree stump in Ireland has attracted thousands of people to a rural churchyard when workmen cutting down trees came acr...