Through careful analysis and the use of state-of-the-art technology, specialists from Mexico, Italy and the United States have determined how Mexica sculptures like "Coyolxauhqui", "Sun Stone", and "Tlaltecuhtli" were painted originally, defining the chromatic palette used by Mexica artists in the late 15th century and early 16th. Studies of paint found in the pores of the stones confirmed that Mexica sculpture, as Greek and Roman, was polychrome. An interdisciplinary team coordinated by the National Institute of Anthropology and History (INAH), has determined the nature of pigments and agglutinants, pictorial techniques and symbolism of Mexica polychromy. At the last conference of the V Jornadas Permanentes de Arqueologia (Fifth Permanent Conferences of Archaeology) organized by INAH Direction of Archaeological Studies, Leonardo Lopez Lujan explained that results of a series of investigations have determined that the chromatic range used by Mexica on their sculptures was integrated by 5 colors: red, ochre, blue, white and black. He declared that numerous sculptural pieces lodged in the National Museum of Anthropology and Templo Mayor Archaeological Zone and Site Museum conserve vestiges of their original paint. The "Sun Stone" is a good example: “It was cleaned and analyzed in 2000, as part of the remodeling of Mexica Hall, at MNA, celebrations. Although it was exposed to the elements almost a century, a group of INAH restorers directed by Mari Carmen Castro achieved to detect rests of red and ochre pigments in the stone pores. [...]