Panegyrici Latini
XII Panegyrici Latini or Twelve Latin Panegyrics is the conventional title of a collection of twelve ancient Roman panegyric orations.
The authors of most of the speeches in the collection are anonymous, but appear to have been Gallic in origin. Aside from the first panegyric, composed by Pliny the Younger in AD 100, the other speeches in the collection date to between AD 289 and 389 and were probably composed in Gaul.
The original manuscript, discovered in 1433, has perished; only copies remain.
Background
Gaul had a long history as a center of rhetoric. It maintained its dominance of the field well into the 4th century. An early lead in the field was taken by the Aedui, early allies of Rome and eager to assimilate to the ways of their new rulers: Maenian schools were celebrated as early as the reign of Tiberius (r. AD 14–37). They continued to flourish into the days of Eumenius' grandfather, but were closed by the mid-3rd century.
There was some revival in the city in the late 3rd century, but after the establishment of Trier as an imperial capital in the 280s, the orators began feeling jealousy for the imperial patronage enjoyed by the citizens of Trier. Despite the political and economic hegemony of the city, however, Trier failed to make any significant mark on the rhetoric of the period.
Nixon and Rodgers suggest that it was simply too close to the imperial court.
The surviving evidence (which might be prejudiced by Ausonius' Professors of Bordeaux) points to a shift from Autun and Trier as centers of the art in the Tetrarchic and Constantinian period, moving to Bordeaux later in the 4th century.