Pedro González de Mendoza

Pedro González de Mendoza (3 May 1428 – 11 January 1495) was a Spanish cardinal, statesman and lawyer. He served on the council of King Henry IV of Castile and in 1467 fought for him at the Second Battle of Olmedo. In 1468 he was named bishop of Sigüenza and in 1473 he became cardinal and archbishop of Seville and appointed chancellor of Castile.

In the subsequent succession dispute, Mendoza supported Isabel's right to succeed her brother, Enrique IV, and participated in the battle of Toro, where the forces of Ferdinand and Isabella defeated the supporters of Juana la Beltraneja. Mendoza's Castilian chancellorship was reconfirmed by Isabel, and in 1482 he became cardinal-archbishop of Toledo and Primate of Spain. He presided over the royal council for 20 years and his influence was such that he was called "the Third King" during the reign of Isabel and Ferdinand. Provided by Wikipedia