Treaty of Tordesillas
The Treaty of Tordesillas was a treaty between Portugal and Spain in 1494 in which they agreed to divide up all the land in the Americas between the two of them, no matter who was already living there. Pope Alexander VI was the pope at the time of the treaty. He drew an imaginary line 2,193 kilometers to the west of the Cape Verde Islands, gave Portugal the land to the east of this line, and gave Spain the land to the west of this line. King Ferdinand and Queen Isabella were the rulers of Spain at the time. One from Castile and one from Aragon. This treaty was signed at Tordesillas, which is how the treaty got its name. This also changed Spanish and Portuguese exploration of the new world.