Enmannsche Kaisergeschichte

The Enmannsche Kaisergeschichte ('Enmann's History of the Emperors') is a modern term for a hypothetical Latin historical work, written in the 4th century, but now lost. In 1884, German scholar Alexander Enmann made a comparison of several late Roman historical works and found many similarities, which could not be explained by a direct literary relationship between the extant works (Eine verlorene Geschichte der roemischen Kaiser und das Buch De viris illustribus urbis Romae).

Source: Wikipedia — Enmannsche Kaisergeschichte (CC BY-SA 4.0)