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Columbus' background is clouded in mystery, very little is really known about Columbus before the mid-1470s. It has been suggested that this might have been because he was hiding something—an event in his origin or history that he deliberately kept a secret.The issue of Columbus' 'nationality' became an issue after the rise of nationalism; the issue was scarcely raised until the time of the quadricentenary celebrations in 1892

Columbus researcher, Jane Francis Amler, have said that he was a converso Jew