Sos del Rey Católico

Ferdinand the Catholic was born here in 1452, in the Palacio de los Sada, and his birth gave Sos the second half of its name. The town stands on a rocky spur on the old border between Navarre and Aragon, its walls still entered through seven gates. Inside are a medieval Jewish quarter, the arcaded Plaza de la Villa and a castle keep looking out to the Pyrenees.

Highlights

• Palacio de los Sada, Ferdinand's birthplace, now a centre on his life
• The castle keep on Peña Felizana, with views of Pyrenean peaks
• Plaza de la Villa, where the medieval market's scale and length measure were checked
• Jewish quarter around Plaza de la Sartén, with a doorway mezuzah slot
• Berlanga's film La vaquilla, shot here in 1985 with locals as extras (ES)

Summary based on Wikipedia and Wikivoyage (CC BY-SA), written with AI assistance.