Lopera Castle exemplifies 13th-century military architecture built by the Order of Calatrava in Jaén's Campiña Baja region. The fortress comprises two enclosures linked by curtain walls: an outer ring protected by five towers and an inner sanctuary dominated by two majestic towers—San Miguel and Santa María—connected by defensive canvases. Following the Castilian conquest (1240–1241), the order strengthened the castle's defenses through the 14th and 15th centuries, establishing it as a crucial border stronghold during Jaén's military campaigns. Declared a Cultural Heritage Asset in 1991, extensive restoration has recovered the castle's original appearance and prominence as a jewel of Iberian defensive architecture, embodying centuries of strategic military design and feudal power.
