[3] During his youth, after his upbringing was entrusted by his grandmother, Queen Berengaria, to Rodrigo Jiménez de Rada, who would also become Archbishop of Toledo, he was sent to Paris for his studies, receiving lessons from Albertus Magnus, the teacher of Thomas Aquinas.

[6] On her arrival at the Castilian court, which at the time was in Valladolid, in January 1258, Christina was presented to the king's brothers, especially to Infantes Frederick and Philip, among whom she was to choose a husband.

[6] The vacancy left by Infante Philip in the Archdiocese of Seville was not filled until May 1259, when Pope Alexander IV named Raimundo de Losana to the post.

However, Infante Philip avoided answering the questions raised by his brother, at the time when he excused himself from leading his troops to Andalusia in the king's service, as he alleged that there had been a delay in the payment of his annual officers' salary, and told his brother that his presence at the meeting at Lerma was due to the advice and assistance which the infante said he needed, for he claimed that his old friends had died and that he "could not be without some friends who would assist and advise him.

At the beginning of July 1272, Alfonso X ordered Nuño González de Lara, his brother Infante Philip, and all the nobles of the kingdom to come with their men to Seville to assist Infante Ferdinand de la Cerda, who at the time was defending the frontier from attack by the Muslims, and the unanimous response of all the participants in the nobles' conspiracy was to refuse to come, unless the king met with them first.

Nuño González de Lara declared the end of his agreement with Alfonso X, which obliged him not to establish common positions with either Muslims or Christians without previously informing the king.

Moreover, they asked him to reduce the frequency of their service to the Cortes, to exempt them from payment of the Burgos municipal tax, and to found no more new towns in Castile and León.

[12] After the Cortes of Burgos of 1272, in which it seemed that the king would reach an agreement with the rebel nobles, negotiations were broken off and the rebels, including Infante Philip and Nuño González de Lara, left for the Kingdom of Granada, in spite of Alfonso's final attempt to persuade them, through his intermediaries Infante Ferdinand de la Cerda and his brother Manuel not to abandon his kingdom.

Before heading for Granada, the nobles sacked the countryside, stealing cattle and laying waste to some of the territory on their way, in spite of the king's sending them messengers bearing letters in which he reminded the rebels of the favors they had received from him, as well as their treacherous rupturing of the bonds between vassal and sovereign.

He specifically reproached Nuño González de Lara for the fact that, during his youth, he had granted him the estate of Écija over the objections of his father King Ferdinand III.

The king sent the dean of the Cathedral of Seville, Fernán Pérez, to talk to Infante Philip in order to persuade him to leave the nobles' party; this attempt failed.

After numerous negotiations, and advice given the king by, among others, his brother Infante Fadrique and Simón Ruiz de los Cameros, he yielded to most of the demands presented by the exiled nobles via Nuño González de Lara, who in 1273 met with Queen Violant in Córdoba, and at the end of that year, the exiled nobles returned to the Kingdom of Castile and León, while at the same time King Muhammed II of Granada declared himself a vassal of Alfonso X, although his Chronicles erroneously place these events in 1274.

She died in Seville in 1262 without issue, and was buried in the Collegiate Church of Saints Cosmas and Damian in Covarrubias, where Philip had been the abbot before resigning his ecclesiastical duties.