The Treaty of Sahagún was signed in Sahagún

Sahagún, Spain

Sahagún is a town in the province of León, Spain. It is the main town of the Leonese section of the Tierra de Campos comarca.Sahagún is notable for containing some of the earliest examples of the mudéjar style of architecture. It lies on the Way of St. James.The initial town arose due to the...

 in 1170 between Alfonso VIII of Castile

Alfonso VIII of Castile

Alfonso VIII , called the Noble or el de las Navas, was the King of Castile from 1158 to his death and King of Toledo. He is most remembered for his part in the Reconquista and the downfall of the Almohad Caliphate...

 and Alfonso II of Aragon

Alfonso II of Aragon

Alfonso II or Alfons I ; Huesca, 1-25 March 1157 – 25 April 1196), called the Chaste or the Troubadour, was the King of Aragon and Count of Barcelona from 1164 until his death. He was the son of Ramon Berenguer IV of Barcelona and Petronilla of Aragon and the first King of Aragon who was...

. Based on the terms of the accord, Alfonso VIII agreed to give Afonso II three hostages in order to be used as tribute payments owed by Ibn Mardanīš of Valencia and Murcia

Murcia

-History:It is widely believed that Murcia's name is derived from the Latin words of Myrtea or Murtea, meaning land of Myrtle , although it may also be a derivation of the word Murtia, which would mean Murtius Village...

. The hostages were to enter into the hand and potestas

Potestas

Potestas is a Latin word meaning power or faculty. It is an important concept in Roman Law.-Origin of the concept:The idea of potestas originally referred to the power, through coercion, of a Roman magistrate to promulgate edicts, give action to litigants, etc. This power, in Roman political and...

(or power) of Afonso I up until the terms of the agreement were met. Moreover, the hostages were not allowed to depart without permission.

Sources

• Kosto, Adam J. Making Agreements in Medieval Catalonia: Power, Order, and the Written Word, 1000-1200. Cambridge University Press, 2001. ISBN 0521792398