James I of Aragon was born in 1208 in Montpellier, France. He had a difficult childhood and lived with Simon of Montfort until becoming an adult in 1218. He went on to conquer several territories including Valencia, Murcia, Mallorca, Menorca, Ibiza, and Formentera, expanding the Crown of Aragon. He wrote an autobiography called "Book of Deeds" chronicling his life and conquests. James I played an important role in developing Catalan trade and maritime power and establishing new laws and administration for his expanding kingdom.