The publication is devoted mostly to the theme of the "tetzáhuitl" or omens that, according to several documentary sources, announced both the arrival of the Spanish conquistadors and the end of the kingdom of Moctezuma II. Above all, the publication focuses on the eight predictions contained in the Libro XII of the Florentine Codex by Bernardino de Sahagún. The exhibition consisted of 30 archaeological and historical pieces. This exhibition details the ways of thinking that in 1519 prevailed in both Mesoamerica and Europe and was organized in commemoration of the 500th anniversary of the first meeting between Moctezuma II and Hernán Cortés, characters who had opposite ways of understanding the world but who agreed on an aspect little addressed: their belief in divine wills. The publication is devoted mostly to the theme of the "tetzáhuitl" or omens that, according to several documentary sources, announced both the arrival of the Spanish conquistadors and the end of the kingdom of Moctezuma II. Above all, the publication focuses on the eight predictions contained in the Libro XII of the Florentine Codex by Bernardino de Sahagún. The exhibition consisted of 30 archaeological and historical pieces. This exhibition details the ways of thinking that in 1519 prevailed in both Mesoamerica and Europe and was organized in commemoration of the 500th anniversary of the first meeting between Moctezuma II and Hernán Cortés, characters who had opposite ways of understanding the world but who agreed on an aspect little addressed: their belief in divine wills.