Treaty of Tordesillas

Under a papal bull issued in 1493, Spain was awarded lands west and south of the line of demarcation, and Portugal received lands east and south. Dissatisfied with this arrangement, however, Portugal and Spain concluded the Treaty of Tordesillas of June 4, 1494, to establish a new line of demarcation 370 leagues west of the Cape Verde Islands, placing all of Africa, India, and later, Brazil, within Portugal’s sphere.

Source: Library of Congress