Enchiladas originated in Mexico, where the practice of rolling tortillas around other food dates back at least to Aztec times. The people living in the lake region of the Valley of Mexico traditionally ate corn tortillas folded or rolled around small fish. Writing at the time of the Spanish conquistadors, Bernal Díaz del Castillo documented a feast enjoyed by Europeans hosted by Hernán Cortés in Coyoacán, which included foods served in corn tortillas. (Note that the native Nahuatl name for the flat corn bread used was tlaxcalli; the Spanish gave it the name tortilla. ) The Nahuatl word for enchilada is chīllapītzalli [t͡ʃiːlːapiːˈt͡salːi], which is formed of the Nahuatl word for "chili", chīlli [ˈt͡ʃiːlːi] and the Nahuatl word for "flute", tlapītzalli [t͡ɬapiːˈt͡salːi]. In the 19th century, as Mexican cuisine was being memorialized, enchiladas were mentioned in the first Mexican cookbook, El cocinero mexicano ("The Mexican Chef"), published in 1831, and in Mariano Galvan Rivera's Diccionario de Cocina, published in 1845.