Agustín de Vetancurt (also written Vetancourt, Betancourt, Betancur; 1620–1700) was a Mexican Catholic historian and scholar of the Nahuatl language. Born in Mexico City, Vetancurt became a Franciscan in Puebla, where he spent 40 years amongst the indigenous. He was official chronicler of the Order, so much of his most important work Teatro Mexicano deals with matters of interest to its members. But it is not only a history of the Franciscans in Mexico, but also a wide-ranging discussion of indigenous history and customs, topics of great interest to Franciscans of the first generation in Mexico. He drew upon the works of fellow Franciscans Gerónimo de Mendieta and Juan de Torquemada. Although he recapitulates some material from his sources, there is considerable material on prehispanic and colonial indigenous not found elsewhere and particularly valuable for the seventeenth century. He was helped in his work by Don Carlos de Siguenza y Gongora, and it is possible that some information on prehispanic indigenous culture came from him. Vetancurt accused his Franciscan predecessor Fray Juan de Torquemada, author of Monarquia Indiana, of plagiarizing the work of Gerónimo de Mendieta. Source: Wikipedia (en)