Amerigo Vespucci was born
On this day · 9 March 1454
Two continents bear the first name of a Florentine navigator who argued that a vast new landmass lay beyond the western ocean.
On 9 March 1454, Amerigo Vespucci was born in Florence, the third son of a notary in one of Renaissance Europe’s wealthiest city-states. Tutored in humanist learning, he later worked for the Medici before turning to the sea during the Age of Discovery.
Between roughly 1497 and 1504 Vespucci sailed on voyages for both Spain and Portugal, charting long stretches of the South American coast. His key argument was bold: the lands across the Atlantic were not the eastern edge of Asia but an entirely separate continent he called the New World.
A first name on a letter became the label for half the planet.
That idea reshaped the map. In 1507 the German cartographer Martin Waldseemüller printed a world map naming the southern continent “America” after Amerigo’s Latinized first name. The label spread to both continents, fixing one navigator’s given name onto the geography of an entire hemisphere.
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