Castillo de Coca in Segovia, Spain, stands as one of the finest examples of Spanish Mudejar architecture, blending Islamic and Gothic design traditions in its distinctive brickwork. Built between 1448 and 1493 by Don Alonso de Fonseca, Bishop of Ávila and Archbishop of Seville, the castle showcases elaborate brick decoration and luxurious interior ornamentation that reflects Renaissance refinement. Uniquely situated at the edge of a plain overlooking a meander of the River Voltoya rather than a hilltop position, the fortress demonstrates sophisticated architectural planning. Originally owned by the aristocratic House of Alba de Tormes until 1954, it was transferred to the Ministry of Agriculture and declared a Spanish National Monument, ensuring its preservation as a significant example of late medieval Spanish military and palatial architecture.