In one minute
What did this event actually change?
The Treaty of Todzilias is the Overseas Division Agreement between Castile and Portugal, 1494. It moved the demarcation line to the west of the Cape Verde Islands to 370 Ligue, which provided a basis for Portugal to claim Brazil in the future and to try to ease the competition between the two countries; however, the route could not be reliably measured at that time, nor did other European countries recognize this arrangement with the society of the divided land.
- Signature
- 7 June 1494
- Parties
- Castile and the Portuguese Crown.
- Boundary
- West of Cape Verde 370 Rig
- Direct purpose
- Dealing with overseas claims conflicts arising from sea voyages
- Key limitations
- Longitude is difficult to measure and excludes local society and other countries
Chronology
A process, not a single date
Causes, turning points and aftermath form one process, far larger than a capital’s fall, a signed treaty or a company’s founding date.
- 01
Columbus to the Caribbean
A Westerly airline financed by Castile has brought the competition between the two countries over the Atlantic islands and future routes to a new stage.
- 02
The Pope's royal decree suggests a more eastern line.
The royal decree of Alexander VI is biased towards Castile, and Portugal therefore continues to call for bilateral negotiations.
- 03
Treaty signed in Todzilias
The parties agreed to move the line to 370 Ligues west of the Cape Verde Islands and Portugal to greater Atlantic space.
- 04
Cabral arrived on the coast of Brazil.
The territorial claims of Portugal were based on the treaty framework; the actual borders of Brazil were still shaped by colonial advances and subsequent treaties.
- 05
The Treaty of Zaragoza deals with Asian disputes
Attempts by the two countries to delimit the dispute over the Moluccas on the other side of the globe have shown that the original boundary is difficult to land directly.
Why would a paper treaty appear in 1494?
Portugal continued to advance along the African coast in the fifteenth century and to operate the islands of the Atlantic Ocean, while the 1492 West Side of Columbus allowed Castile to suddenly submit another set of overseas claims. The two routes of expansion may collide, and it is not an identified continental border that the parties are arguing about who has the right to continue to sail, occupy and monopolize space that has not yet been mapped by Europeans.
The papal bull provides religious-legal support to Castile, but it does not satisfy Portugal. The final agreement came from the real negotiations between the two royal families: the boundary moved from a relatively easterly position to 370 Ligue west of Cape Verde. It is both an armistice arrangement and an institutional tool for transforming oceanic navigation into a sovereign, religious mission and commercial privilege.
How does this line work?
The treaty uses the term "regor" to specify distances, but does not give a modern longitude that can be stabilized at sea. The 15th century crew could estimate latitude, but it was difficult to determine it precisely; the Cape Verde Islands themselves were not a single point. Thus, the seemingly clear midday line on the map continues to have room for interpretation in the survey, negotiation and actual occupation.
This does not mean that the treaty is null and void. On the contrary, it provides a common language for the two countries to issue licences for navigation, deal with competitors and interpret colonial actions. Its strength derives from the repeated execution of claims by the royal family, the fleet and the positions, rather than from a line that can be seen on the surface of the sea.
How does it affect Brazil without deciding anything?
When Cabral arrived on the eastern coast of South America in 1500, the Treaty provided Portugal with the legal framework in which that status was claimed to be on its side. Since then, the Portuguese colonies have developed with Brazil at their centre, resulting in a marked difference between the Portuguese-speaking and Spanish-speaking Americas.
But the Brazilian map today is directly attributable to the fact that in 1494 the line was oversimplified. The advance of the colonizers to the interior, resistance and migration of indigenous peoples, resource development, slavery and subsequent diplomacy in the 17-18th century have gradually changed the scope of de facto control; ultimately, the borders have moved far beyond the usual presumptions of early demarcation.
Who's not at the negotiating table?
The Treaty ' s most important silence is its view of the maritime areas and land in Africa, the Americas and Asia as objects that can be allocated by the two European royal families. The local political community, port society and First Nations are neither involved nor lose their own notion of sovereignty. To call the treaty “the partition of the world” is to describe the attempts of the Ibero-American Empire and not the fact that it is commonly accepted by the world.
European forces, such as England, France and Nedrand, later denied Western Portuguese monopolies. As they enter the Atlantic Ocean and Asia, the dividing system is constantly challenged by private exploitation, trade and war. The long-term significance of the treaty is thus not so much that it really divides the planet into two, but rather that it clearly demonstrates how the European empire combines its course, map and law with its claim to possession.
Evidence boundary
Fact, interpretation and uncertainty
The evidence reveals where imperial claims diverged from reality and where heroic stories compressed complex wars.
Date, parties and treaties deposited by 370 Ligue Medium
The texts of the treaties deposited between Spain and Portugal and the UNESCO registration materials are mutually corroborating, and on 7 June 1494, the distance between the two royal chambers and the boundary is a fundamental fact of clear evidence.
There is no single, uncontroversial modern longitude of the dividing line.
The length of a league, the choice of starting island, and contemporary longitude measurements all remain uncertain. The treaty defined a relative position, not one undisputed modern meridian.
Parting the World is an empire proposition, not a global agreement.
The treaty binds only two contracting households. It does not have the consent of the inhabitants of the land in question, nor does it automatically allow other European countries to accept the overseas monopoly of Western Portugal.
Questions
Common questions
Did Spain sign the treaty with Portugal?
More precisely, one of the contracting parties is the Portuguese Crown, while the other is the Castilian Crown, represented by the joint monarchy of Castile and Aragon. “Spain” is easy to understand, but the political structure of 1494 is not exactly the same as that of the modern nation State.
Why does Brazil speak Portuguese?
The Treaty provided an early legal basis for Portugal ' s claims in eastern South America, and the Portuguese language had since been dominated by colonial settlements, administration and the slave economy. Language patterns are not created automatically by a single line.
Did the Pope divide the world between two countries?
The papal decree of 1493 was involved in shaping earlier claims, but the treaty of 1494 was the result of further negotiations between the two countries. Neither the royal decree nor the treaty represent recognition by the local community of the sovereign right of Europe to own these lands.
Can you find this line today?
A number of possible locations can be estimated on historical maps, but it is difficult to give a single answer. Treaty measurement units, starting points and then longitude techniques leave uncertainty.
Sources
Sources and further verification
Archives, museums, international organizations and academic publications support the facts and interpretive limits in this account.
- Tordesillas Treaty, 1494UNESCO Memory of the World
- Tratado de TordesillasMinisterio de Cultura de España
- Tratado de Tordesillas: catálogo PARESPortal de Archivos Españoles
- The 1562 Map of AmericaLibrary of Congress
Age of Seas editorial research distinguishes verifiable facts, historical interpretation and potentially misleading simplifications.Editorial standards and corrections ↗