Codex Xolotl

[1] It is annotated in Nahuatl and details the preconquest history of the Valley of Mexico, and Texcoco in particular, from the arrival of the Chichimeca under the king Xolotl in the year 5 Flint (1224) to the Tepanec War in 1427.

Although this picture is confirmed by the Texcocan historian Fernando de Alva Cortés Ixtlilxochitl (1568 or 1580–1648), there is other evidence that suggests that the area was inhabited by the Toltecs.

[6] The codex was first brought to Europe in 1840 by the French scientist Joseph Marius Alexis Aubin [fr], and is currently held by the Bibliothèque nationale de France in Paris.

[8] The Codex Xolotl has been an important source in giving detailed information on material, social, political and cultural changes in the region during the period.

This debate roots itself in the work of Jeffrey Parsons in 1970s, with his book detailing the archaeology of the Texcoco region.