John II of Portugal

King of Portugal from 1481 to 1495, John II strengthened royal authority and sponsored voyages that advanced Portuguese exploration along the African coast.

Portuguese Empire: A network of Portuguese territories, trading posts, and maritime claims established across several continents from the fifteenth century onward. John II’s voyages and crown-led expansion helped lay foundations for Portugal’s overseas empire.
Portuguese crown: The institution of monarchy and royal government in Portugal. John II used crown institutions to assert authority over nobles and direct overseas policy.
Afonso V of Portugal: King of Portugal from 1438 to 1481 and John II’s father. Afonso V’s reign preceded John II’s consolidation of royal power.
House of Aviz: A Portuguese royal dynasty that ruled from 1385 until the succession crisis of 1580. John II belonged to this dynasty, whose authority he worked to strengthen.
Ferdinand II of Aragon: King of Aragon from 1479 to 1516 and, with Isabella of Castile, a ruler of the Spanish monarchy. His negotiations with John II show the competing Iberian crowns dividing overseas claims.
Portuguese discoveries: The fifteenth- and sixteenth-century Portuguese voyages that explored sea routes and coasts in Africa, Asia, and the Atlantic. His reign advanced the crown’s systematic exploration of the African coastline.
Bartolomeu Dias: A Portuguese navigator whose expedition rounded the southern tip of Africa in 1488. John II commissioned the voyage that established a sea passage beyond southern Africa.
Manuel I of Portugal: King of Portugal from 1495 to 1521, succeeding John II and presiding over major overseas expansion. Manuel inherited a strengthened monarchy and the maritime projects advanced under John II.
Portuguese Interregnum: The succession crisis of 1383–1385 that ended with the founding of the House of Aviz. The crisis established a political tradition of royal legitimacy that shaped later Portuguese monarchy.
Isabella I of Castile: Queen of Castile from 1474 to 1504 and a ruler of the Spanish monarchy alongside Ferdinand II of Aragon. Her support for Columbus’s voyage contrasted with John II’s rejection of the proposal.

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