Sos

Sos stands on a rocky height in northern Aragon, close to the historic border with Navarre. Its castle and walls reflect the town's position between the two kingdoms; the surviving medieval defenses include gates that once controlled access to its streets.

During the Navarrese civil war, Queen Juana Enríquez came to Sos and gave birth there in 1452 to Ferdinand, later king of Aragon. The town also had a medieval Jewish quarter; the expulsion decree of 1492 forced its Jewish inhabitants to leave or convert. In 1711 Sos was designated the capital of the Cinco Villas district.