The sons of Francisco I, hostages in Pedraza Historical milestone · Pedraza, Comunidad de Villa y Tierra de Pedraza, Segovia Two sons of King Francis I of France remained shut up in the castle of Pedraza as hostages of Carlos V until 1530, an episode of the rivalry between the two monarchs that placed this mountain town in European politics. hasta 1530 Photo: Fedoce1 (CC BY-SA 4.0) What to see and do in Pedraza