Decimus Iunius Iuvenalis, known in English as Juvenal, was a Roman poet active in the late first and early second century AD. He is the author of the collection of satirical poems known as the Satires. The details of the author's life are unclear, although references within his text to known persons of the late first and early second centuries AD fix his earliest date of composition. One recent scholar argues that his first book was published in 100 or 101. Because of a reference to a recent political figure, his fifth and final surviving book must date from after 127.