The Treaty of Tordesillas, signed in Tordesillas, Spain, on 7 June 1494, and ratified in Setúbal, Portugal, divided the newly discovered lands outside Europe between Portugal and the Crown of Castile, along a meridian 370 leagues west of the Cape Verde islands, off the west coast of Africa. That line of demarcation was about halfway between Cape Verde and the islands visited by Christopher Columbus on his first voyage, named in the treaty as Cipangu and Antillia.

Tordesillas is a town and municipality in the province of Valladolid, Castile and León, central Spain. It is located 25 kilometres (16 mi) southwest of the provincial capital, Valladolid at an elevation of 704 metres (2,310 ft). The population was c. 8,760 as of 2021.