Ab urbe condita, is a monumental history of ancient Rome written in the Latin language by Titus Livius(Livy), an ancient Roman historian. The work covers the time from the stories of Aeneas, the earliest legendary period from before the city's founding in c. 753 BC, to Livy's own times in the reign of the emperor, Augustus. The last year covered by Livy is 745 AUC, or 9 BC, the death of Drusus. About 25% of the work survives.

Livy's History of Rome was in demand from the publication of the first packet. Livy became so famous that a man from Cadiz travelled to Rome just to see him, and once he had seen, returned home. The popularity of the work continued through the entire classical period. A number of Roman authors used Livy, including Aurelius Victor, Cassiodorus, Eutropius, Festus, Florus, Granius Licinianus and Orosius.