The Canterbury Tales (Middle English: Tales of Caunterbury) is a collection of over 20 stories written in Middle English by Geoffrey Chaucer at the end of the 14th century, during the time of the Hundred Years' War. The tales (mostly written in verse, although some are in prose) are presented as part of a story-telling contest by a group of pilgrims as they travel together on a journey from Southwark to the shrine of Saint Thomas Becket at Canterbury Cathedral. The prize for this contest is a free meal at the Tabard Inn at Southwark on their return. After a long list of works written earlier in his career, including Troilus and Criseyde, House of Fame, and "Parliament of Fowls", The Canterbury Tales is near-unanimously seen as Chaucer's magnum opus. He uses the tales and the descriptions of its characters to paint an ironic and critical portrait of English society at the time, and particularly of the Church. Structurally, the collection resembles The Decameron, which Chaucer may have read during his first diplomatic mission to Italy in 1372. Canterbury Tales is a collection of stories built around a frame narrative or frame tale, a common and already long established genre of its period. Chaucer's Tales differs from most other story "collections" in this genre chiefly in its intense variation. Most story collections focused on a theme, usually a religious one. Even in the Decameron, storytellers are encouraged to stick to the theme decided on for the day. The idea of a pilgrimage to get such a diverse collection of people together for literary purposes was also unprecedented, though "the association of pilgrims and storytelling was a familiar one". Introducing a competition among the tales encourages the reader to compare the tales in all their variety, and allows Chaucer to showcase the breadth of his skill in different genres and literary forms.