Geoffrey Chaucer began writing his famous “Canterbury Tales” in the early 1380s, and crucially he chose to write it in English. Other important works were written in English around the same time, if not earlier, including William Langland’s “Piers Plowman” and the anonymous “Sir Gawain and the Green Knight”. But the “Canterbury Tales” is usually considered the first great works of English literature, and the first demonstration of the artistic legitimacy of vernacular Middle English, as opposed to French or Latin.