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.