The Castillo de Santiuste near Corduente, Guadalajara province, exemplifies 15th-century plainland fortress design, built by Juan Ruiz de Molina following royal permission granted by King Juan II in 1434. Constructed in ashlar stone with four corner towers and a surrounding barbican, this strategic stronghold protected Castilian interests against Aragonese expansion. Though damaged by the 1755 Lisbon earthquake and modified during the Carlist Wars, the castle retains its distinctive square plan and defensive architecture. Now privately owned, the fortress hosts medieval-themed events, bridging its centuries as a noble family seat with contemporary cultural uses while preserving its architectural heritage.
