Oliba was very influential. In 1023, King Sancho III of Navarre asked him for advice because he wanted his sister Urraca to her second cousin Alfonso V of León. Obliba said not to do it, but Sancho ignored him. His letters to the various contemporaneous kings of Spain indicate to us that Alfonso and his successor, Vermudo III, were regarded as "imperatore. "And the king of Navarre was a mere "rex".