Question: Who did Our Lady of Guadalupe appear to prompting the Basilica of Our Lady of Guadalupe to be built on the top of Tepeyac?
Context: Tepeyac or the Hill of Tepeyac, historically known by the names "Tepeyacac" and "Tepeaquilla", is located inside Gustavo A. Madero, the northernmost "delegación" or borough of the Mexican Federal District.  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. Colonia Villa de Guadalupe (also known as La Villa de Guadalupe Hidalgo) is a former separate town, now a neighborhood in northern Mexico City which in 1531 was the site of the apparition of Our Lady of Guadalupe, the most renowned Marian apparition in the Americas.  She can be venerated in the Our Lady of Guadalupe Shrine, located in the "villa" (town). Codex Escalada (or Codex 1548) is a sheet of parchment on which there have been drawn, in ink and in the European style, images (with supporting Nahuatl text) depicting a Marian apparition, namely that of Our Lady of Guadalupe to Juan Diego which is said to have occurred on four separate occasions in December 1531 on the hill of Tepeyac north of central Mexico City.  If authentic, and if correctly dated to the mid-16th century (as tests so far conducted indicate), the document fills a gap in the documentary record as to the antiquity of the tradition regarding those apparitions and of the image of the Virgin associated with the fourth apparition which is venerated at the Basilica of Guadalupe.  The parchment first came to light in 1995, and in 2002 was named in honour of Fr.  Xavier Escalada S.J. who brought it to public attention and who published it in 1997. Guadalupe Station is a station on the Manila Metro Rail Transit System Line 3 (MRT-3).  The station is one of the many elevated stations that can be found on the line.  It is located in Makati, Philippines and is named because of its location in Barangay Guadalupe Nuevo in Makati.  The barangay (and its counterpart barangay, Guadalupe Viejo) is named after Our Lady of Guadalupe. The Stradanus engraving is a 1615 or 1621 (depending on the source) engraving that was used to print certificates of indulgences of forty days' remission of sins from Juan Pérez de la Serna, then Archbishop of Mexico.  The certificates were given to people who donated money to finance the construction of the new sanctuary of Tepeyac, consecrated in 1622, which later became the Basilica of Guadalupe.  Its actual title is "Virgen de Guadalupe con escenas de ocho milagros" (Spanish: "Virgin of Guadalupe with scenes of eight miracles" ), but the term Stradanus engraving is used by Guadalupan researchers.  The plate was engraved by Samuel Stradanus of Antwerp, who also provided engravings for the publication of Pedro de Moya's 1622 "Sanctum provinciale concilium mexici" (Latin: "Holy council of the province of Mexico" ), the decrees of the 1585 Third Mexican Council.  It is the first document to depict the apparition of the Virgin of Guadalupe, and may have been a source of the "Nican motecpana", the portion of the "Huei tlamahuiçoltica", an early source of the Guadalupan apparition, that relates the miracles associated with the icon. Marcos Cipac de Aquino (? –1572), informally known as Marcos the Indian, was a Roman Catholic Nahuatl artist in sixteenth-century Mexico, who may have been the painter of the image of the Virgin of Guadalupe.  Art historian Jeanette Favrot Peterson has ventured "Marcos Cipac (de Aquino) was the artist of the Mexican Guadalupe, capable of executing a large Marian painting on cloth within a professional milieu that was abundantly stock to stimulate his innate artistry." .  The basis of her conjecture is evidence in the "Anales de Juan Bautista", a manuscript housed in the Biblioteca Boturini of the Basilica of Guadalupe and translated and published in 2001.  Mexican scholars of the nineteenth century posited the painting's artist as Marcos Cipac de Aquino, including Joaquín García Icazbalceta in his ""Carta acerca del Origen ce la Imagen de Nuestra Sra.  de Guadalupe"" (1883) and Francisco del Paso y Troncoso's ""Noticia del indio Marcos y de otros pintores del siglo XVI"" (1891).  There is some skepticism about the identification of the painting with Cipac Aquino.  He is identified a 1556 sermon, but referred to him only as Marcos.  This sermon came to light only in 1888.  Marcos de Aquino is credited with the painting also by Leoncio Garza-Valdés on the basis of a scientific investigation. The Basilica of Guadalupe or Santuario de Nuestra Señora de Guadalupe, is a Roman Catholic church located in the metropolitan area of Monterrey, Nuevo León, Mexico.  Standing in the neighborhood of Colonia Independencia, just outside the city's downtown area, the temple is one of the larger Church edifices in northern Mexico.  It is dedicated to Virgin Mary in her guise as Our Lady of Guadalupe, the Patroness of America, who appeared to St Juan Diego on Tepeyac Hill outside Mexico City in 1531. Our Lady of Guadalupe (Spanish: "Nuestra Señora de Guadalupe" ), also known as the Virgin of Guadalupe (Spanish: "Virgen de Guadalupe" ), is a Roman Catholic title of the Blessed Virgin Mary associated with a venerated image enshrined within the Minor Basilica of Our Lady of Guadalupe in Mexico City.  The basilica is the most visited Catholic pilgrimage site in the world, and the world's third most-visited sacred site.  Pope Leo XIII granted the venerated image a Canonical Coronation on 12 October 1895. Our Lady of Guadalupe Parish Church, designated as the Diocesan Shrine of Our Lady of Guadalupe of the Roman Catholic Diocese of San Pablo, is the only Roman Catholic Church in Pagsanjan, Laguna, Philippines, and the oldest church in the Philippines under the patronship of Our Lady of Guadalupe.  It is home to the patroness of Pagsanjan, Our Lady of Guadalupe, whose image was a gift from Mexico.  The current shrine rector is Monsignor Mario Rafael M. Castillo. The Basilica of Our Lady of Guadalupe (Spanish: "Basílica de Nuestra Señora de Guadalupe" ) is a Roman Catholic church, basilica and National shrine of Mexico in the north of Mexico City.  The shrine was built near the hill of Tepeyac where Our Lady of Guadalupe is believed to have appeared to Saint Juan Diego Cuauhtlatoatzin.  This site is also known as "La Villa de Guadalupe" or, in a more popular sense, simply "La Villa", as it has several churches and related buildings.
Answer: Saint Juan Diego Cuauhtlatoatzin