1454

In 1454, the First Doctor, Susan, Ian Chesterton and Barbara Wright visited the Aztec empire. Barbara, mistaken for the reincarnation of Yetaxa, tried in vain to stop the Aztec practice of human sacrifice. (TV: The Aztecs, PROSE: The Left-Handed Hummingbird) According to another account, this happened in 1507. (PROSE: The Aztecs)