Rowan Gavin Paton Menzies was a British submarine lieutenant-commander who authored books claiming that the Chinese sailed to America before Columbus. Historians have rejected Menzies' theories and assertions and have categorised his work as pseudohistory.
He was best known for his controversial book 1421: The Year China Discovered the World, in which he asserts that the fleets of Chinese Admiral Zheng He visited the Americas prior to European explorer Christopher Columbus in 1492, and that the same fleet circumnavigated the globe a century before the expedition of Ferdinand Magellan. Menzies' second book, 1434: The Year a Magnificent Chinese Fleet Sailed to Italy and Ignited the Renaissance, extended his discovery hypothesis to the European continent. In his third book, The Lost Empire of Atlantis, Menzies claims that Atlantis did exist, in the form of the Minoan civilization, and that it maintained a global seaborne empire extending to the shores of America and India, millennia before actual contact in the Age of Discovery.