Diego Rodríguez Porcelos (governed 873 – c. 885), was the second Count of Castile, succeeding his father Rodrigo.

[2] Shortly before 882, he built a castle in Pancorbo from where he confronted a large Arab army trying to annex the valley of the Ebro in two different military campaigns in 882 and 883.

[3] He also created a defensive line along the river Arlanzón, and in 884 founded an outpost that would develop into the city of Burgos.

His date and place of death are not agreed upon by the chronicles, though 885 is most probable as recorded in the Chronica Naierensis which states that Didacus comes...et interfectus est in Cornuta era DCCCCXXIII, secundo kalendas febroarii,[4] that is, that he was killed in Cornudilla on 31 January, and most likely, in a battle against the Muslim troops faithful to the Banu Qasi.

These were: In a roundabout near the Museum of Human Evolution in Burgos, there is an equestrian statue in his honour, made in 1983 by sculptor Juan de Ávalos.