According to tradition, Mary appeared to Juan Diego, who was an Aztec convert to Christianity, on December 9 and again on December 12, 1531. She requested that a shrine to her be built on the spot where she appeared, Tepeyac Hill (now in a suburb of Mexico City). The bishop demanded a sign before he would approve construction of a church, however. Mary appeared a second time to Juan Diego and ordered him to collect roses. In a second audience with the bishop, Juan Diego opened his cloak, letting dozens of roses fall to the floor and revealing the image of Mary imprinted on the inside of the cloak—the image that is now venerated in the Basilica of Guadalupe.