Answer
The Cid, also known as Rodrigo Díaz de Vivar, was a Castilian nobleman who lived in the 11th century. He was a military leader and statesman who played a key role in the Reconquista, the Christian reconquest of the Iberian Peninsula from the Moors. The Cid is a legendary figure in Spanish history and culture, and his exploits have been the subject of many works of literature, art, and music.