After the death of the Marquis of Villena, his pupil, Don Iñigo Lopez de Mendoza, Marquis of Santa Juliana, or Santillana, appears at the head of the brilliant society of poets who adorned the court of John II. Whenever a Marquis of Santillana is mentioned in the history of Spanish literature, without any more particular description, it is this nobleman that is meant. He was born in the year 1398. His elevated rank and great fortune, joined to the military and political talents by which he was distinguished from youth upwards, placed him in a situation in which he was called upon to perform a principal part among the nobles of Castile. His intellectual culture had for its basis the philosophy of Socrates; and his strict morality procured him no less celebrity than his sound understanding and love of science.[75] This uncommon union of rank, influence, character, talents, and learning, could not fail to render the Marquis of Santillana highly respected; and he was indeed regarded as so extraordinary a man, that foreigners are said to have undertaken journies to Castile for the sole purpose of seeing him. He was greatly esteemed by king John, who, during the civil wars, constantly received from him, in return, the homage which was due to a protector of learning, though the Marquis was not always of that prince’s party. After the death of John II. in the latter years of his life, this eminent man assisted with his counsels Henry IV. under whom the regal authority in Castile was subsequently almost annihilated. He died in the year 1458.