He left Castile to his eldest son, Don Sancho, Leon to Don Alfonso, Galicia to Don Garcia, and gave his daughters, Dona Urraca and Dona Elvira, the wealthy cities of Zamora and Toro.

Of course this disposal of property did not prove satisfactory to all his heirs, and Don Sancho was especially displeased, because he coveted the whole realm.
He, however, had the Cid to serve him, and selected this doughty champion to accompany him on a visit to Rome, knowing that he would brook no insult to his lord.

These previsions were fully justified, for the Cid, on noticing that a less exalted seat had been prepared for Don Sancho than for the King of France, became so violent that the Pope excommunicated him.

But when the seats had been made of even height, the Cid, who was a good Catholic, humbled himself before the Pope, and the latter, knowing the hero's value as a bulwark against the heathen Moors, immediately granted him full absolution.
"'I absolve thee, Don Ruy Diaz, I absolve thee cheerfully, If, while at my court, thou showest Due respect and courtesy.'" _Ancient Spanish Ballads_ (Lockhart's tr.).
[Sidenote: The Cid Campeador.] On his return to Castile, Don Sancho found himself threatened by his namesake, the King of Navarre, and by Don Ramiro of Aragon.

They both invaded Castile, but were ignominously repulsed by the Cid.