Castile and Portugal signed the Treaty of Alcáçovas (later ratified at Toledo), ending the Castilian Succession conflict and recognizing Portugal’s Atlantic predominance south of the Canaries—an important backdrop for later Iberian boundary-making in the Americas.
Pope Alexander VI issued Inter caetera, drawing a pole-to-pole line 100 leagues west (and south) of the Azores/Cape Verde and granting Spain rights to lands beyond it, intensifying Portuguese objections and prompting negotiations that led to Tordesillas.
Portugal and Castile signed the Treaty of Tordesillas, shifting the demarcation line to 370 leagues west of Cape Verde—creating the legal basis Portugal later used to claim the Brazilian coast within its hemisphere.
Pedro Álvares Cabral’s India-bound armada sighted the Brazilian mainland, a landfall later associated with Monte Pascoal and the Porto Seguro region; this encounter anchored Portugal’s practical claim under Tordesillas-era reasoning.
Pêro Vaz de Caminha completed his letter to King Manuel I from “Island of Vera Cruz,” the earliest detailed written description of the land and peoples of what became Brazil, and a foundational documentary source for early Portuguese claims.
A Portuguese expedition associated with Gonçalo Coelho and Amerigo Vespucci departed Lisbon and conducted major coastal reconnaissance of Brazil (1501–1502), helping define the extent of the coastline Portugal sought to control and exploit.
The Cantino Planisphere (1502) incorporated recent Portuguese discoveries, showing Brazil’s coast and marking the Tordesillas demarcation (“raya”), reflecting how cartography supported diplomatic and territorial claims.
Portuguese merchant Fernão de Loronha held a royal charter (commonly dated 1502–1512) tied to brazilwood exploitation, marking the shift from discovery to organized commercial extraction supported by coastal trading infrastructure (feitorias).
King Manuel I donated the Captaincy of São João (the Fernando de Noronha archipelago) as a hereditary captaincy to Fernão de Loronha, linking early Atlantic islands to Brazil’s emerging claim-and-trade system.
Pope Julius II issued Ea quae pro bono pacis, approving and ratifying the Treaty of Tordesillas—important because papal confirmation strengthened the treaty’s standing among Catholic powers despite earlier bull conflicts.
Cristóvão Jacques commanded patrols along the Brazilian coast to deter French incursions tied to brazilwood trade, reflecting how weak early occupation led Portugal to assert control through naval policing rather than settlement.
Martim Afonso de Sousa commanded Portugal’s first major colonizing expedition to Brazil (1530–1533), signaling a policy shift from trade outposts toward settlement and territorial administration to defend claims and exclude rivals.
Sousa founded São Vicente (near modern Santos) as one of the first permanent Portuguese settlements (1532), creating a foothold for more durable territorial possession beyond paper claims.
King John III began dividing Brazil into hereditary captaincies (capitanias hereditárias), delegating settlement, defense, and governance responsibilities to donees—an institutional response to foreign incursions and limited royal capacity.
John III appointed Tomé de Sousa as Brazil’s first governor-general, replacing fragmented captaincy governance with a centralized royal authority intended to secure territory, strengthen defenses, and coordinate colonization.
Tomé de Sousa arrived in Bahia and founded Salvador as a fortified capital, establishing an administrative center that anchored Portugal’s coastal control and marked the transition from early claims and scattered settlements to structured colonial rule.
Treaty of Tordesillas and early territorial claims in Brazil (1494–1549)
