Froissart took a serious approach to his work. He traveled in England, Scotland, Wales, France, Flanders and Spain gathering material and first-hand accounts for his Chronicles. He traveled with Lionel, Duke of Clarence, to Milan to attend and chronicle the duke's wedding to the daughter of Galeazzo Visconti. At this wedding, two other significant writers of the Middle Ages were present: Chaucer and Petrarch.