Res gestae (Ammianus Marcellinus)

The Rerum gestarum libri XXXI (commonly abbreviated as Res gestae) is a historical work written by the Roman officer Ammianus Marcellinus beginning around 380 and likely completed by 392.

The title is not original. The term Res gestae was later used by Priscian of Caesarea. and translates to "The Things Accomplished." The manuscript Vaticanus Latinus 1873 labels it Rerum gestarum libri, though a more accurate title might be Rerum gestarum libri ab excessu Neruae.