Sancho III of Castile

Sancho III, called the Desired (c. 1134–1158), ruled Castile and Toledo from 1157 until his death. The eldest son of Alfonso VII of León and Castile and Berengaria of Barcelona, he received Castile while his brother Ferdinand II took León under their father's will. His nickname reflected his birth after eight years of childless marriage.

In May 1158 the brothers signed the Treaty of Sahagún, partitioning their conquests against al-Andalus. Sancho granted the castle of Calatrava to the monk Raymond of Fitero, giving rise to the Order of Calatrava. He married Blanche of Navarre in 1151 and was succeeded by their son Alfonso VIII.