Gaius Trebonius Proculus Mettius Modestus was a Roman senator of the 2nd century AD who held a number of offices in the imperial service, as well as serving as suffect consul in 103 as the colleague of Marcus Flavius Aper.
Hans-Georg Pflaum first traced the rise of this family, identifying their origins in Petelia, a small Greek-speaking town in Bruttium, whence they emigrated to Arles when Julius Caesar settled one of their ancestors, a soldier or centurion of his Legio VI, there.
[4] He may be the same Mettius Modestus Pliny the Younger mentions in a letter to his friend Voconius Romanus.
[5] Bernard Remy dates his exile to the year 93, when Domitian punished a number of Senators on the grounds of conspiracy.
[7] The locals memorialized his tenure by erecting a monumental triple-arched gate in Patara, Lycia (in modern-day Antalya Province, Turkey) which still stands.