The only extant work by Livy (64 or 59 BCE 12 or 17 CE) is part of his history of Rome from the foundation of the city to 9 BCE. Of its 142 books, 1 10, 21 45 (except parts of 41 and 43 45), fragments, and short summaries remain. Livy s history is a source for the "De Prodigiis" of Julius Obsequens (fourth century CE).