
Peñafiel Castle is built with stone from Campaspero. It measures 210 metres long, and 33 wide. Largely responsible for building the castle we see today was Don Juan Manuel. He was one of the richest lords in Castile and played an very active part in the politics of the kingdom. He was married to the granddaughter of King Ferdinand III. He also occupies an important place in Spanish literature as one of its most important writers from the Middle Ages. He was the prototype of the medieval knight; not only involved in wars but also cultivated.