Marcus Manilius was a Roman poet, astrologer, and author of a poem in five books called Astronomica. The author of Astronomica is neither quoted nor mentioned by any ancient writer. Even his name is uncertain, but it was probably Marcus Manilius; in the earlier books the author is anonymous, the later give Manilius, Manlius, Mallius. The poem itself implies that the writer lived under Augustus or Tiberius, and that he was a citizen of and resident in Rome. According to the early 1700s classicist, Richard Bentley he was an Asiatic Greek; according to the 19th-century classicist Fridericus Jacob an African. His work is one of great learning; he had studied his subject in the best writers, and generally represents the most advanced views of the ancients on astronomy.