[1] On the death of Alfonso VII (21 August 1157) his realms were partitioned between his two sons: Castile, with Toledo to the eldest, and León, with Galicia, to the younger one.
If either party ignored his treaty obligations the lands reverted to the other after a year, save those bestowed on Osorio, who secured hereditary rights.
[4] Sancho and Ferdinand also agreed to aid one another militarily against any enemy save their uncle, Raymond Berengar IV, Prince of Aragon.
León received the right to conquer the regions of the cities of Niebla, Montánchez, Mérida, Badajoz, Évora, Mértola, and Silves, an extension of the Vía de la Plata to the sea by Lisbon.
[1] There forty other lay and clerical confirmants, including Sancha Raimúndez, styled regina (queen), the brothers' aunt, and four bishops (of, in order of precedence, Palencia, Zamora, Astorga, and León).