Son of the preceding; was a minor at the death of his father, and the country was governed by his mother, Blanche of Castile, with a strong hand; on attaining his majority he found himself engaged with the English under Henry, who had been called on to assist certain of the great barons in revolt, but in 1242 he defeated them in three engagements; under a vow he made during a dangerous illness he became a crusader, and in 1249 landed in Egypt with 40,000 men, but in an engagement was taken prisoner by the Saracens; released in 1250 on payment of a large ransom, though he did not return home for two years after, till on hearing of the death of his mother, who had been regent during his absence; on his return he applied himself to the affairs of his kingdom and the establishment of the royal power, but undertaking a second crusade in 1270, he got as far as Tunis, where a plague broke out in the camp, and he became one of the victims, and one of his sons before him; he was an eminently good and pious man, and was canonised by Boniface VIII. in 1297 (1215-1270).