On December 9th and 12th of 1531, the Virgin Mary appeared twice to an Aztec Christian convert, Saint Juan Diego Cuauhtlatoatzin. She has asked him to build a shrine dedicated to her on the site of her apparition, the Tepeyac Hill. When San Juan Diego approached the bishop on the second time to approve the construction of the church, the image of the Virgin Mary revealed to be imprinted in his tilma, a poncho-like cloak made of cactus fiber.