1507

In 1507, the First Doctor, Ian, Barbara and Susan visited Mexico and encountered the Aztecs, where Barbara was mistaken for the deity Yetaxa. (PROSE: The Aztecs) According to another account, this happened in the year 1454. (PROSE: The Left-Handed Hummingbird) Yet another account claims that these events had already transpired in 1506, but it does not specify an exact date. (PROSE: Against Nature)