Catholic Monarchs Ferdinand and Isabella granted Christopher Columbus privileges, appointing him Admiral of the Ocean Sea, Viceroy, and Governor of any new lands he discovered. The agreement aimed to secure a westward route to Asia for trade in spices and wealth, promising Columbus noble titles and a share of profits while ensuring Spain’s dominance in overseas commerce and empire-building.

Columbus’s letter announcing the results of his first voyage was published across Europe, describing the islands he encountered, their peoples, and the vast potential for wealth and Christian expansion. Framing the discovery as a triumph for Spain, the letter promised new lands rich in resources and ripe for conversion, bolstering Spanish prestige and competition with rival European powers.

An agreement between Spain and Portugal, mediated by the Pope, that divided newly discovered lands outside Europe along a meridian 370 leagues west of the Cape Verde Islands. This treaty granted Spain rights to most of the Americas while Portugal secured control over Africa, Asia, and later Brazil, shaping the course of global empire.

Amerigo Vespucci, a Florentine navigator working for Spain, claimed to have sailed on a 1497–1498 voyage along the coast of the New World, possibly reaching Central America, though the authenticity of this voyage remains disputed by historians.

The Spanish Crown issued royal instructions authorizing Christopher Columbus to promote permanent settlement on Hispaniola by distributing land and requiring colonists to cultivate crops and develop the island’s resources. This decree marked an early shift from exploration toward organized colonization and agricultural exploitation in Spain’s emerging American empire.

Venetian explorer John Cabot, sailing under commission from England’s Henry VII, made landfall on the coast of North America, likely Newfoundland, on June 24, becoming the first known European since the Norse to reach the mainland. His voyage laid the foundation for England’s territorial claims in the New World, shaping the future of English colonization.

A political treatise offering pragmatic advice to rulers on how to gain and maintain power. It was dedicated to Lorenzo de’ Medici, intended as both a plea for political employment and a manual for effective rule. Machiavelli argued that leaders should prioritize stability and authority, even through deception, fear, or cruelty when necessary, famously noting it is better for a prince to be feared than loved if he cannot be both.

On September 25, 1513, Vasco Núñez de Balboa crossed the Isthmus of Panama and became the first recorded European to sight the Pacific Ocean from the Americas. He formally claimed the vast body of water—then called the “South Sea” (Mar del Sur)—for the Crown of Spain, establishing Spain’s strategic awareness of a western ocean that would shape future exploration and imperial expansion. These events were recorded in a letter he wrote as a report to Spain.

Hernán Cortés reported to King Charles I of Spain (Charles V) on his march into the Aztec Empire, the seizure of Tenochtitlan, and the complex alliances he forged with Indigenous rivals of the Mexica. The letter justified his unauthorized actions by portraying the conquest as both a service to the Crown and a campaign to expand Christian rule and Spanish sovereignty in the newly claimed territories.

Giovanni da Verrazzano’s first voyage was undertaken in the service of King Francis I of France to find a western sea route to Asia. Sailing along the Atlantic coast of North America Verrazzano made some of the earliest European descriptions of the region, including New York Harbor. His voyage strengthened France’s claims to North America and laid the groundwork for later French exploration and colonization.

A vast ethnographic study of Aztec society, religion, language, and daily life based on testimony from Indigenous Nahua informants in central Mexico. Often known as the Florentine Codex, the manuscript preserves one of the most detailed contemporary records of pre-conquest and early colonial New Spain, blending Nahuatl and Spanish text with hundreds of illustrations.

Elizabeth I granted letters patent to Sir Humphrey Gilbert, authorizing him to discover, claim, and govern remote “heathen and barbarous lands” not already possessed by any Christian prince in the name of England. The patent empowered Gilbert to establish colonies, exercise civil and criminal jurisdiction over settlers, and retain a share of profits, laying early legal foundations for English overseas expansion.