Local media reported that yesterday, 500 people visited the house in the normally quiet town of Jalhay to witness what is being referred to as "the mysterious glowing Virgin".
Police have been required to bolster their presence around a pavilion erected by the retired Belgian owners of the statue, which witnesses suggest lets out a dull glow after dark.
The phenomenon was first noticed in mid-January and has gradually attracted larger crowds, with local media reporting that some of those visiting the statue claim to have been cured of a skin condition.
The town has since become a pilgrim destination in largely Catholic Belgium, although Catholic authorities from the Banneux sanctuary are expressing caution about the "glowing" Virgin.
"It's certain that something is going on but I can't tell you whether there is a natural or a miraculous explanation," said Father Leo Palm, who was sent to investigate the statue by the bishop of Liege.