El Cid Sword. Rodrigo Diaz Vivar del Cid, Burgos was a Castilian knight who came to dominate the front of his own entourage of the east coast of the Iberian Peninsula in the late 11th century, independently under the authority of a king. Valencia managed to win in this city and established a separate domain from June 15, 1094 until his death. . Includes hem.