Treaty of tordesillas world map

The first successful expeditions across the Atlantic Ocean raised the question of what to do with the archipelagos and new lands discovered by these navigators.

In 1479, Portugal and Castile signed an initial treaty confirming Castile’s dominion over the Canaries, while recognizing Portugal’s monopoly on the African coast.

This agreement was confirmed two years later by a Bull issued by the Pope.

Portugal could now take possession of all lands south of the parallel crossing through the Canary Islands on condition that they undertake evangelical missions.

Christopher Columbus’ discoveries in 1492 played havoc with this situation, and the following year Spain was given a new Bull from the Pope.

 This drew a new line along the meridian 100 leagues west of the Azores and the Cape Verde Islands.

Portugal protested and demanded direct negotiations between the two Iberian countries, which led to the Treaty