The Castle of Guijosa stands near Sigüenza in Guadalajara's Castile-La Mancha region as a remarkable example of 14th-century fortress architecture transforming into a palatial residence. Built by Iñigo López de Orozco in the mid-14th century, this pentagonal-plan castle features a central tower keep with windows, balconies, and machicolations surrounded by walls with semicircular turrets at its corners. Originally surrounded by a moat, it once belonged to influential noble families including the House of Medinaceli and the Count Luis de la Cerda. Though only the exterior is accessible to visitors, the castle's architectural sophistication reflects the period's transition from purely military to residential design, earning it recognition as a cultural asset of interest.