In the early modern period, the voyages of Columbus initiated European exploration and colonization of the American continents, and are thus of great significance in world history. Christopher Columbus was a navigator and an admiral for Castile, a country that later founded modern Spain. He made four voyages to the Americas, with his first in 1492, which resulted in what is widely referred to as the Discovery of America or Discovery of the Americas.

The discovery of the Americas has variously been attributed to others, depending on context and definition. For example, the Vikings (c. 1000) had previously established a settlement at L'Anse aux Meadows, Newfoundland. While Columbus was not the first European to voyage to the New World and did not actually reach the mainland until his third voyage in 1498 (when he reached South America, and the fourth voyage, when he reached Central America), his discoveries led to the major European sea powers sending expeditions to the New World to build trade networks and colonies and to convert the native people to Christianity.