2634764 Three signatures of Christopher Columbus (litho) by Columbus, Christopher (1451-1506) (after); Private Collection; (add.info.: Christopher Columbus (1450 -1506) was an Italian explorer, navigator, colonizer and citizen of the Republic of Genoa. The month after Columbus returned from his first voyage, he began signing his name in a new way? pyramid of dots and letters. Although he never explained what the mysterious signet meant, he used it on nearly everything he signed until his death 13 years later.); Spanish, out of copyright.