1451-1512 1452-1519 1469-1527 1470-1519 1470-1521? 1485-1528 1730-1816 973 active1495-1515 agostino america amerigo biography cartography civilization discoveryandexploration earlymaps earlyworksto1800 explorers filippo geography giovannida italianinfluences leonardo machiavelli martin mazzei name niccolò portugal portuguese spain spanish verrazzano waldseemüller worldmaps