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How did the Monumentum Ancyranum preserve Augustus’s account of his rule?

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Neo-Assyrian clay tablet from the 7th century BC inscribed with dense cuneiform writing, known as the Flood Tablet from the Epic of Gilgamesh, displayed in the British Museum. — epigraphy The Flood Tablet, 11th cuneiform tablet in a series relating the Gilgamesh epic, from Nineveh, 7th century bce; in the British Museum, London.

The Monumentum Ancyranum serves as a vital epigraphic record by preserving the Res gestae divi Augusti, an autobiographical account of the reign of Augustus. Originally intended to be engraved on bronze pillars at his mausoleum in Rome, the text was disseminated across the empire through copies erected at various temples, most notably on the walls of the Temple of Rome and Augustus at Ancyra.12

This inscription functions as a primary historical source, detailing Augustus’s magistracies, public benefactions, and diplomatic and military achievements. By presenting these events, the text illustrates how the emperor wished to be remembered: as a traditional aristocrat who restored the republic and acted through popular consensus, rather than as an autocrat. The version at Ancyra is particularly significant because it provides both the original Latin text and an official Greek paraphrase, ensuring the account was accessible to diverse populations within the Roman province of Galatia. While it offers a curated self-portrait of his rule, it remains a critical counterpoint to the interpretations found in later literary works, such as the Annals of Tacitus.12