1545 – 1590

Bernardino de Sahagún and Nahua scholars compile the Florentine Codex

From 1545 until his death in 1590 the Franciscan Sahagún works with Nahua elders and former Tlatelolco students on a twelve-book study of Aztec life in Nahuatl and Spanish. The final version is dated 1569 in the source used.