 Together he and his father were the probable authors of the famous Catalan Atlas of 1375.Cresques' work was highly sought after; in 1390 John I of Aragon paid 60 livres and 8 sous for one of his maps.After the Aragonese persecutions of 1391 he was forcibly converted to Christianity, at which time he took the name Jaume Riba, Jacobus Ribus, in Latin.