Amerigo Vespucci was born into a respected Florentine family with connections to the Medici. His father Nastagio was a notary, and the family had a tradition of civic service and intellectual pursuits.

Vespucci received a humanist education from his uncle Giorgio Antonio Vespucci, a Dominican friar and scholar. He studied Latin, mathematics, astronomy, and natural philosophy.

Vespucci began working for Lorenzo di Pierfrancesco de' Medici, a cousin of Lorenzo the Magnificent. He managed financial affairs and gained experience in commerce and banking.

Vespucci began overseeing the outfitting of ships for his Medici patrons, learning about navigation, ship provisioning, and the emerging transatlantic trade.

Vespucci relocated to Seville, then the center of Spanish maritime activity, to manage Medici commercial interests and oversee ship outfitting for exploration voyages.

Vespucci worked for Juanoto Berardi, a Florentine merchant who helped finance and provision Columbus's expeditions, giving Amerigo firsthand exposure to Atlantic exploration.

Vespucci participated in an expedition led by Alonso de Ojeda, exploring the coast of present-day Venezuela and discovering the mouth of the Amazon River. He served as navigator and cartographer.

On a Portuguese-sponsored voyage, Vespucci explored the coast of Brazil extensively, charting the coastline and observing the indigenous peoples. He noted the vastness of the landmass.

During his second major voyage, Vespucci concluded that the lands he explored were not part of Asia but a New World entirely unknown to Europeans. This insight was revolutionary.

Vespucci wrote his famous letter describing the New World, which was published and widely circulated throughout Europe. It popularized the idea that a new continent had been discovered.

A letter attributed to Vespucci describing four voyages to America was published and translated into multiple languages, making him famous throughout Europe as an explorer and geographer.

Vespucci returned to Spain and became a Spanish citizen, seeking employment with the Casa de Contratacion, the agency overseeing Spanish colonial trade and exploration.

German cartographer Martin Waldseemuller published a world map naming the new continent America after Amerigo's latinized name, believing Vespucci had discovered the mainland.

King Ferdinand appointed Vespucci as Pilot Major, responsible for training pilots, examining charts, and maintaining the master map of new discoveries. He held this position until his death.

Vespucci established training standards for Spanish pilots, teaching celestial navigation techniques and ensuring accurate cartographic records of the expanding Spanish empire.

Amerigo Vespucci died of malaria in Seville. His name endures on two continents, though Columbus discovered the Americas first, it was Vespucci who recognized them as a New World.