Patroness of the Americas.
The following is from the website
http://www.sancta.org, an excellent tribute and labor of love dedicated to Our Lady of Guadalupe.
"Our Lady of Guadalupe
Mesoamerica, the New World, 1521: The capital city of the Aztec empire falls under the Spanish forces. Less than 20 years later, 9 million of the inhabitants of the land, who professed for centuries a polytheistic and human sacrificing religion, are converted to Christianity. What happened in those times that produced such an incredible and historically unprecedented conversion?
In 1531 a "Lady from Heaven" appeared to a humble Native American at Tepeyac, a hill northwest of what is now Mexico City.
She identified herself as the ever virgin Holy Mary, Mother of the True God for whom we live, of the Creator of all things, Lord of heaven and the earth.
She made a request for a church to be built on the site, and submitted her wish to the local Bishop. When the Bishop hesitated, and requested her for a sign, the Mother of God obeyed without delay or question, sending Her native messenger to the top of the hill in mid-December to gather an assorment of roses for the Bishop.
After complying to the Bishop's request for a sign, She also left for us an image of herself imprinted miraculously on the native's tilma, a poor quality cactus-cloth, which should have deteriorated in 20 years but shows no sign of decay 475 years later and still defies all scientific explanations of its origin.
It apparently even reflects in Her eyes what was in front of her in 1531." (more at site)
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The "humble Native American" is known to us by his Christian name, Juan Diego, and the Church has named him a saint. St. Juan Diego's tilma bearing the image of Our Lady of Guadalupe, which should have deteriorated more than 400 years ago, is in the Basilica of Guadalupe in Mexico City. It is the most popular Marian shrine in the world, visited by some ten million people each year. Only the Vatican is visited by more people.
I encourage everyone to check out sancta.org; you may want to bookmark it as a source for prayers, including a Novena to OLG, a virtual Rosary, a recording of "Ave Maria," links to other important sites, and much more information about Our Lady of Guadalupe and the series of apparitions to Juan Diego, plus many photographs.
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"Let not your heart be disturbed. Do not fear that sickness, nor any other sickness or anguish. Am I not here, who am your Mother? Are you not under my protection? Am I not your health? Are you not happily within my fold? What else do you wish? Do not grieve nor be disturbed by anything."
(Words of Our Lady to Juan Diego)