Who married Sancha of Castile, Queen of Navarre?

Sancha of Castile (c. 1139–5 August 1177 or 1179) was daughter of Alfonso VII of León and Castile and his first wife Berengaria of Barcelona. Sancha was the fifth child of seven born to her parents.

On 20 July 1153, Sancha married Sancho VI of Navarre. He is responsible for bringing his kingdom into the political orbit of Europe. As "la reyna de Navarra, filla del emperador" (the queen of Navarre, daughter of the Emperor) her 5 August 1179 death was reported in the Annales Toledanos, while in the Chronacles of Navarre she died in August 1179.