 James I inherited as a child the titles of King of Aragon, Count of Barcelona, and Lord of Montpellier, but also became by conquest King of Majorca and King of Valencia.James emphasises in his chronicles his conquest of Majorca (1229) and of Valencia (1238).James I of Aragon dedicates a couple of chapters to his mother Maria of Montpellier and his father Peter II of Aragon (called "Peter the Catholic"), who had been given the title of ""Rex Catholicissimus"" by the Pope after the Battle of Las Navas de Tolosa in which he helped Alfonso VIII of Castile fight against the Moors, one year before his death.