Lucius Marius Maximus Perpetuus Aurelianus (more commonly known as Marius Maximus) (c. AD 160 – c. AD 230) was a Roman biographer, writing in Latin, who in the early decades of the 3rd century AD wrote a series of biographies of twelve Emperors, imitating and continuing Suetonius. Marius's work is lost, but it was still being read in the late 4th century and was used as a source by writers of that era, notably the author of the Historia Augusta. The nature and reliability of Marius's work, and the extent to which the earlier part of the HA draws upon it, are two vexed questions among the many problems that the HA continues to pose for students of Roman history and literature.