such as Odo of Châteauroux, Cardinal Bishop of Tusculum and former Chancellor of the University of Paris, Pope Innocent IV's policy was nonetheless continued by subsequent popes. Relations with the Jews In April 1250 (5 Iyar), Innocent IV ordered the Bishop of Córdoba to take action against the Jews who were building a synagogue whose height was not acceptable to the local clergy. Documents from the reign of Pope Innocent IV recorded resentment toward a prominent new congregational synagogue: The Jews of Cordoba are rashly presuming to build a new synagogue of unnecessary height thereby scandalizing faithful Christians, wherefore ... we command [you] ... to enforce the authority of your office against the Jews in this regard.... Diplomatic relations Relations with the Portuguese Innocent IV was responsible for the eventual deposition of King Sancho II of Portugal at the request of his brother Afonso (later King Afonso III of Portugal. One of the arguments he used against Sancho II in the Bull Grandi non immerito was Sancho's status as a minor upon inheriting the throne from his father Afonso II. Contacts with the Mongols The warlike tendencies of the Mongols also concerned the Pope, and in 1245, he issued bulls and sent a papal nuncio in the person of Giovanni da Pian del Carpine (accompanied by Benedict the Pole) to the "Emperor of the Tartars". The message asked the Mongol ruler to become a Christian and stop his aggression against Europe. The Khan Güyük replied in 1246 in a letter written in Persian mixed Turkic that is still preserved in the Vatican Library, demanding the submission of the Pope and the other rulers of Europe. In 1245 Innocent had sent another mission, through another route, led by Ascelin of Lombardia, also bearing letters. The mission met with the Mongol ruler Baichu near the Caspian Sea in 1247. The reply of Baichu was in accordance with that of Güyük, but it was accompanied by two Mongolian envoys to the Papal seat in Lyon, Aïbeg and Serkis. In the letter Guyuk demanded that the Pope appear in person at the Mongol imperial headquarters, Karakorum, in order that “we might cause him to hear every command that there is of the jasaq”. In 1248 the envoys met with Innocent, who again issued an appeal to the Mongols to stop their killing of Christians. Innocent IV would also send other missions to the Mongols