 Over the next two decades Erasmus traveled extensively. He returned to France for a time, made two more journeys to England, and traveled to Italy where he obtained a doctorate in theology at the University of Turin. In 1517 he finally settled in Leuven. By that time he had made a name for himself. He had published a number of bestsellers: the witty satire Encomium Moriae  (The Praise of Folly, 1511); the Adagia, which he enriched and expanded to more than 4000 proverbs; and the devotional Enchiridion Militis Christiani (Handbook of the Christian Soldier, 1503). In 1516, he published his magnum opus, an edition of the Greek New Testament, the first to reach the market. It anticipated the Complutensian Polyglot, which was already in print but still awaiting the papal imprimatur. Thus Erasmus found success in four different genres: literature, education, religion, and theology. In a catalogue he published in 1523, Erasmus arranged his writings under nine headings: works furthering language arts, that is, literary and educational writings; his collection of adages; his correspondence; works furthering moral education (he noted that their content overlapped with works in the first category); works promoting piety; the annotated edition of the New Testament; paraphrases on the New Testament; polemics; and editions and translations of patristic works.