In September 1162, King

Alfonso II of Aragon Alfonso II (1–25 March 1157Benito Vicente de Cuéllar (1995)«Los "condes-reyes" de Barcelona y la "adquisición" del reino de Aragón por la dinastía bellónida» p. 630-631; in ''Hidalguía''. XLIII (252) pp. 619–632."Alfonso II el Casto, h ...

and King

Ferdinand II of León Ferdinand II ( 1137 – 22 January 1188), was a member of the Castilian House of Burgundy, Castilian cadet branch of the House of Ivrea and List of Leonese monarchs, King of León and kingdom of Galicia, Galicia from 1157 until his death. Life ...

signed a treaty at

Ágreda Ágreda is a municipality located in the Soria (province), province of Soria, in the autonomous community of Castile and León, Spain. Ágreda is the regional services center in the Northeast of the Soria (province), province of Soria. Its abund ...

. It affirmed the

treaty of Tudilén The Treaty of Tudilén (or Treaty of Tudején) was signed between Alfonso VII of León and Castile and Ramon Berenguer IV, Count of Barcelona on 27 January 1151 at Tudilén, near Aguas Caldas in Navarre. Contents The partition of Navarre, after th ...

signed by their fathers in 1151. The two kings committed themselves to the conquest and division of the

Kingdom of Navarre The Kingdom of Navarre ( ), originally the Kingdom of Pamplona, occupied lands on both sides of the western Pyrenees, with its northernmost areas originally reaching the Atlantic Ocean (Bay of Biscay), between present-day Spain and France. The me ...

. Alfonso, who was a child, recognized Ferdinand's superiority, admitting his title " king of the Spains" (

Latin Latin ( or ) is a classical language belonging to the Italic languages, Italic branch of the Indo-European languages. Latin was originally spoken by the Latins (Italic tribe), Latins in Latium (now known as Lazio), the lower Tiber area aroun ...

''rex Ispaniarum'') and placing himself and his land under Ferdinand's "defense and wardship". Ferdinand took the title "tutor" and betrothed his new ward to his sister,

Sancha Sancha is a given name, the feminine version of the Spanish Sancho. Sanchia, Sancia, and Santina are variant feminine forms. People named Sancha include: * Sancha, Lady of Alenquer (1180–1279), feudal Lady of Alenquer *Sancha of Aragon (1478� ...

. The Leonese prelate Pedro Gudestéiz was one of the treaty's negotiators. The treaty was a triumph for Ferdinand, who took advantage of the fact that the kings of both Aragon and Castile at the time were children. He was accompanied to Ágreda by many Castilian prelates, including the

archbishop of Toledo The Archdiocese of Toledo () is a Latin Church archdiocese of the Catholic Church located in Spain.

, . The treaty of Ágreda negated both the proposed marriage of Alfonso to

Mafalda of Portugal Infanta Mafalda of Portugal (also known as Blessed Mafalda, O.Cist. (c. 1195 – 1 May 1256 in Rio Tinto, Gondomar; ) was a Portuguese ''infanta'' (princess), later Queen consort of Castile for a brief period. She was the second youngest dau ...

and the clause in Alfonso's father's will that gave his guardianship to King

Henry II of England Henry II () was King of England The monarchy of the United Kingdom, commonly referred to as the British monarchy, is the form of government used by the United Kingdom by which a hereditary monarch reigns as the head of state, with the ...

. The treaty worsened Alfonso's relations with Castile. It was abrogated by Alfonso II in 1169, when he signed the

treaty of Sangüesa The Treaty of Sangüesa between Alfonso II of Aragon and Sancho VI of Navarre was signed on 19 December 1168 at the church of in Sangüesa on the Navarrese side of the river Aragón. It provided for a twenty-year truce and an alliance against Muh ...

with Navarre. Nevertheless, the marriage to Sancha was celebrated in 1174.

Notes

Bibliography

* * * * *{{cite book , first1=Carles , last1=Vela Aulesa , first2=Manuel , last2=Riu i Riu , first3=Maria Teresa , last3=Ferrer i Mallol , title=Tractats i negociacions diplomàtiques de Catalunya i de la Corona catalanoaragonesa a l'edat mitjana , volume=1.2: Tractats i negociacions diplomàtiques amb els regnes peninsulars i l'Àndalus (segle XI – 1213) , editor2=Manuel Riu i Riu , editor1=Maria Teresa Ferrer i Mallol , chapter=La política ibèrica de Barcelona i la Corona d'Aragó (segle XI – 1213) , pages=19–115 , publisher=Institut d'Estudis Catalans , location=Barcelona , year=2018 1162 in Europe Treaties of the Kingdom of León Treaties of the Crown of Aragon