Question: Where is this late post-classic Mexica sculpture, which Antonio de León y Gama wrote an essay about at the time the sculpture was discovered, housed?

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Juan Ponce de León y Loayza: Juan Ponce de León y Loayza (born San Juan, Puerto Rico) was the son of Juan Ponce de León II (born "Juan Troche-Ponce de León"), the interim Spanish governor of Puerto Rico in 1579.  His mother was Isabel de Loayza born in Villa Talavera de la Reina, Toledo, Spain, the daughter of Governor Iñigo López de Cervantes y Loayza.  The city of Ponce, Puerto Rico, was named after Juan Ponce de León y Loayza.

Patricia de la Garza De León: Patricia de la Garza De León (1775–1849) was the matriarch of one of the prominent founding families of early Texas.  Doña Patricia raised ten children, some of whom helped change the course of history.  At age 49, she uprooted her life in 1824 to help her husband Martín De León establish the predominantly Mexican De León's Colony.  She contributed her inherited assets to the founding of the colony, and helped establish a school and a church.  From the onset, she worked to instill a sense of Mexican and Spanish culture in the colony.  After the death of her husband, Doña Patricia assumed the role of head of the family.  Recorded Texas Historic Landmark number 6539 placed at Evergreen Cemetery in 1972 acknowledges Patricia de la Garza De León's contribution to Texas.  Recorded Texas Historic Landmark number 6543 placed at Church and Bridge Streets in 1936 denotes the home of Patricia de la Garza De León and Don Martin De León's home in Victoria.

Aztec calendar stone: The Sun Stone, Stone of the Five Eras, or sometimes (erroneously) called Aztec calendar stone is a late post-classic Mexica sculpture housed in the National Anthropology Museum in Mexico City, and is perhaps the most famous work of Aztec sculpture.  The stone is 358 cm in diameter and 98 cm thick, and it weighs about 24 tons.  Shortly after the Spanish conquest, the monolithic sculpture was buried in the Zócalo, the main square of Mexico City.  It was rediscovered on December 17, 1790 during repairs on the Mexico City Cathedral.  Following its rediscovery, the calendar stone was mounted on an exterior wall of the Cathedral, where it remained until 1885.  Most scholars think that the stone was carved some time between 1502 and 1521, though some believe that it is several decades older than that.

Loma de León Natural Monument: The Loma de León Natural Monument (Spanish: "Monumento Natural Loma de León" ) Also Loma de León Is a natural protected area located in the municipality of Iribarren, belonging to the state of Lara, Venezuela.  It received the status of national monument on February 2, 1987.

Silvestre De León: Silvestre De León (1802–1842) was the second son born to the influential De León family in Victoria, Texas.  He became the third alcalde of Victoria.  De León joined his brother-in-law Plácido Benavides to fight with Stephen F. Austin at the 1835 Siege of Béxar.  He joined the rest of the De León family in New Orleans in 1836 after Brigadier General Thomas Jefferson Rusk ordered the evacuation of Mexican families from Victoria.  In 1842, he returned to Victoria and was murdered by persons unknown.  Texas Historical Marker number 6544 placed at Evergreen Cemetery in 1972 acknowledges Silvestre De León's contribution to Texas.

Palacio de los Deportes de León: Palacio de los Deportes de León, also known as Palacio Municipal de los Deportes de León is a Multi-use Indoor arena in León, Spain.  Built in 1970, It has a seating capacity of 5,188 seats, and is currently the home venue for Baloncesto León basketball team and CB Ademar León handball team.

Antonio de León y Gama: Antonio de León y Gama (1735–1802) was a Mexican astronomer, anthropologist and writer.  When in 1790 the Aztec calendar stone (also called sun stone) was discovered buried under the main square of Mexico City, he published an essay about it, "Descripción histórica y cronológica de las dos piedras que con ocasión del nuevo empedrado que se está formando en la plaza principal de México, se hallaron en ella el año de 1790" ("Historical and chronological description of two Stones that were found in the plaza of Mexico in 1790 upon the occasion of laying the new pavement") explaining the functioning of aztec calendars.

Kingdom of León: The Kingdom of León (] ; Leonese: "Reinu de Llïón", Spanish: "Reino de León" , Galician: "Reino de León" , Portuguese: "Reino de Leão" , Latin: "Regnum Legionense" ) was an independent kingdom situated in the northwest region of the Iberian Peninsula.  It was founded in AD 910 when the Christian princes of Asturias along the northern coast of the peninsula shifted their capital from Oviedo to the city of León.  The County of Portugal separated to become the independent Kingdom of Portugal in 1139 and the eastern, inland part of León was joined to the Kingdom of Castile in 1230.

Martín De León: Martín De León (1765–1833) was a rancher and wealthy Mexican empresario descended from Spanish aristocracy.  He was the patriarch of one of the prominent founding families of early Texas.  De León and his wife Patricia de la Garza established De León's Colony, the only predominantly Mexican colony in Texas.  They founded the town of Victoria, on the Guadalupe River, originally named "Villa de Nuestra Señora de Guadalupe Victoria Nombre de Jesús".  The name on the land grant acknowledged both the river and Mexico's president Guadalupe Victoria.  Martín's first career was as a supplier of basic necessities to Real de San Nicolás mine workers.  He joined the Fieles de Burgos regiment in 1790, being promoted to Captain.  The De León E–J (Espíritu de Jesús) cattle brand became the first registered brand in what was to become Texas.  The extended De León family included politicians and freedom fighters who helped alter the course of history both in Texas and in Mexico.  Recorded Texas Historic Landmark number 6542 placed at Evergreen Cemetery in 1936 acknowledges Don Martin de León's contribution to Texas.  Recorded Texas Historic Landmark number 6543 placed at Church and Bridge Streets in 1936 denotes Don Martin de León's home in Victoria.

Fernando De León: Fernando De León (1798–1853) was a co-founder of Victoria, Texas, and the first commissioner and colonization manager of De León's Colony.  He fought against Antonio López de Santa Anna.  De León was an aide-de-camp to provisional Texas governor James W. Robinson.  In the war's confusion about Mexican loyalties, De León was first incarcerated by the Mexican army, only to be released and be incarcerated by the Texas army.  When his brother Silvestre was murdered, he adopted Silvestre's sons.  After the war, he legally recovered 50,000 acre of his land that had been redistributed to Texans.  Recorded Texas Historic Landmark number 6541 placed at Evergreen Cemetery in 1972 acknowledges Fernando De León's contribution to Texas.

Supporting paragraphs: Antonio de León y Gama Aztec calendar stone
Answer: National Anthropology Museum