Lorca Castle (Spanish: Castillo de Lorca) in Lorca, Murcia, Spain, is a fortress of medieval origin constructed between the 9th and 15th centuries. It consists of a series of defensive structures that, during the Middle Ages, made the town and the fortress an impregnable point in the southeast part of the Iberian Peninsula. Lorca Castle was a key strategic point of contention between Christians and Muslims during the Reconquista. It is listed as a Site of Cultural Interest. It is 640 m long and 120 m wide, and one of the largest castles in Spain.

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