 His most important contributions to Mexican archaeology were the recovering of the ruins of Santa Cecilia Acatitlan and the studies about the yacatas structures in the Michoacán area of Tzintzuntzan.He also initiated the archaeological works showing the mural paintings of the Cholula pyramid in Puebla.He taught history of Mexican art and architecture during 35 years, at the National School of Anthropology and the National Academy of San Carlos, in Mexico City.