Sancho III of Navarre
So influential was Oliba that, in 1023, King Sancho III of Navarre consulted him on the propriety of marrying his sister Urraca to her second cousin, Alfonso V of León. The bishop objected, but Sancho ignored him. Oliba's letters to the various contemporaneous kings of Spain indicate to us that Alfonso and his successor, Vermudo III were regarded as "imperatores", while the king of Navarre was a mere "rex", though eventually "rex Ibericus".