[[Category:th century| *]] [[Category:s| *]] [[Category:th century decades]] According to Barbara Wright and Susan Foreman, 1520 was the year that Hernando Cortez landed in Mexico and began his conquest of the Aztecs. (TV: The Aztecs) The First Doctor (PROSE: The Aztecs) and Bernice Summerfield (PROSE: The Left-Handed Hummingbird) believed it had happened the previous year.