Polybius of Megalopolis: Greek citizen turned historian of Rome. Born around 200 B.C.E., the Romans took him as a hostage in 167 when they overthrew the Macedonian kingdom of Perseus. In Rome, Polybius met Scipio Aemilianus and came to admire Roman institutions, including their "mixed constitution." When offered a chance to go home after about a dozen years of exile, he chose to stay in Rome, not returning to Greece until 146. He died probably 118 B.C.E. Although of some historical significance, he is remembered primarily for his history of Rome and the Mediterranean world, which is considered to be highly accurate (although it leaves much to be desired stylistically). Unfortunately, only about five books survive, although Polybius was heavily used by other historians such as Livy.