Llibre dels fets
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 . 
<triplet> Maria of Montpellier <subj> Peter II of Aragon <obj> spouse <triplet> Peter II of Aragon <subj> Maria of Montpellier <obj> spouse <subj> Battle of Las Navas de Tolosa <obj> significant event <triplet> Alfonso VIII of Castile <subj> Battle of Las Navas de Tolosa <obj> significant event