Tepeyac or the Hill of Tepeyac, historically known by the names Tepeyacac and Tepeaquilla, is located inside Gustavo A. Madero, the northernmost Alcaldía or borough of Mexico City. According to the Catholic tradition, it is the site where Saint Juan Diego met the Virgin of Guadalupe in December 1531, and received the iconic image of the Lady of Guadalupe. The Basilica of Our Lady of Guadalupe located there is one of the most visited Catholic shrines in the world. Spanish colonists erected a Catholic chapel at the site, Our Lady of Guadalupe, "the place of many miracles." It forms part of the Sierra de Guadalupe mountain range.