The Treaty of Alcañices or Treaty of Alcanizes (; ) was made in Alcañices between King Denis of Portugal and King Fernando IV of Castile in 1297. Denis was the grandson of King

Alfonso X of Castile Alfonso X (also known as the Wise, ; 23 November 1221 – 4 April 1284) was King of Castile, Kingdom of León, León and Kingdom of Galicia, Galicia from 1 June 1252 until his death in 1284. During the April 1257 Imperial election, election of 1 ...

and essentially an administrator and not a warrior king. He went to war with the kingdom of Castile in 1295, relinquishing the villages of Serpa and Moura, but gained Olivença and reaffirmed Portugal's possession of the

Algarve The Algarve (, , ) is the southernmost NUTS statistical regions of Portugal, NUTS II region of continental Portugal. It has an area of with 467,495 permanent inhabitants and incorporates 16 municipalities (concelho, ''concelhos'' or ''município ...

and defined the modern borders between the two Iberian countries. The treaty also established an alliance of friendship and mutual defense, leading to a peace of 40 years between the two nations.

Fernando Fernando is a Spanish and Portuguese given name and a surname common in Spain, Portugal, Italy, France, Switzerland, and former Spanish or Portuguese colonies in Latin America, Africa and Asia (like the Philippines, India, and Sri Lanka). It is e ...

then married Denis's daughter, Infanta Constance of Portugal, making her Queen of Castile.

References

Alcanices Alcanices Alcanices Alcanices History of the province of Zamora {{Treaty-stub