Its the most visited Marian precinct in the world, surpassed only by the Basilica of San Pedro. Although the figures quoted are not uniform, about twenty million pilgrims visit the sanctuary annually, of which about nine million do so in the days close to December 12, when Santa María de Guadalupe is celebrated. Annually, Basilica of Santa María de Guadalupe has at least twice as many visitors as the most famous Marian shrines, which is why it is an outstanding social and cultural phenomenon