Alcázar de Toro is a castle with roots in the 10th century that achieved its distinctive form during the 15th century, situated in the town of Toro in Zamora province, Castile and León. King Alfonso IX began the castle's initial construction between 1188 and 1195, but it was Queen María de Molina who rebuilt and redesigned the fortress after 1283, giving it the architectural form it maintains today. The castle held strategic importance throughout the medieval period, notably serving as the last stronghold of Juana la Beltraneja in the region during civil conflicts. Its commanding position above the Douro River offers panoramic views of the landscape, making it a visually dominant landmark. Though currently closed to the public, the castle remains a significant historical monument reflecting centuries of Castilian royal and military heritage.