There are many structural and thematic similarities between Piers Plowman by Langland (1330-1400) and House of Fame by Chaucer (1342-1400), two Middle English poems relating dream visions
Some critics have argued that because a number of the shared elements are uncommon in Middle English poetry, and because Langland' s poem probably predates Chaucer' s by a few years, Chaucer was most likely influenced by Piers Plowman when writing House of Fame
Many of the themes and structures of Piers Plowman are also found in Latin, Italian, French works with which Chaucer could well have been familiar.