Why a tilma?
Juan Diego and his wife converted to Catholicism in Mexico in the 16th century and a few years later, he experienced a vision of Our Lady on the Feast of the Immaculate Conception. She asked him to build a church on Tepeyac Hill, but he was unable to convince the bishop, so he asked Our Lady for help. She told him to go to the top of the hill and fill his tilma (cloak) with flowers. When he returned to the bishop, he opened his flower-filled tilma, revealing the imprinted image of Our Lady of Guadalupe.