The Codex Borbonicus is one of the most interesting documents dealing with pre-Spanish Mexico in the 16th century. The large-formatted illuminated manuscript delivers information like no other. The fact that it also provides mysteries, not yet solved, make the manuscript even more interesting.
The style of this Aztec illuminated manuscript is from the high valley region of Mexico before the Spanish conquest and during this time period, its‘ style was uncommonly magnificent. In the evaluation of style, one is dependent upon copies from the colonial age, since all other manuscripts were exported and there is no original remaining. The Codex Borbonicus therefore, is a copy of a pre-Spanish illuminated manuscript from the early colonial age.
The value of the Codex as a source of information about the Mexican language is emphasized by the fact that it serves not only as a illuminated manuscript for calendared information but also as a work which with certainty originated out of the strong influence of the Aztec capital, almost devoid of any European influences.