The Azcatitlan Codex returned to Mexico for the first time since 1840 as France and Mexico celebrate 200 years of diplomatic relations ▻ ↧ Centuries-old manuscript narrating Aztec history returns on loan to... The Azcatitlan Codex, a rare manuscript that recounts the founding of the Aztec capital of Tenochtitlan and the subsequent arrival ​of Spanish conquistadores, is back in Mexico for the first time ‌since 1840.