Marcus Terentius Varro (116–27 BC) was a Roman polymath and a prolific author. He is regarded as ancient Rome's greatest scholar, and was described by Petrarch as "the third great light of Rome" (after Virgil and Cicero).[1] He is sometimes called Varro Reatinus ('Varro of Rieti') to distinguish him from his younger contemporary Varro Atacinus.[citation needed]