Geoffrey Chaucer.  The Works of Geoffrey Chaucer: Newly printed . . . . 1545. Third edition. 

Shakespeare was familiar with the Canterbury Tales, and traces of them are found in Lucrece, A Midsummer Nightís Dream, and Titus Andronicus.  The story of Troilus and Cressida is taken from Chaucerís version rather than the Iliad.