Amerigo Vespucci was born on March 9th , 1454 .
Amerigo Vespucci , born March 3rd , 1454 -- February 22nd , 1512 , was an Italian explorer , financier , navigator and cartographer who first demonstrated that Brazil and the West Indies did not represent Asia 's eastern outskirts as initially conjectured from Columbus ' voyages , but instead constituted an entirely separate landmass hitherto unknown to Old Worlders .
Amerigo Vespucci