[4] The ancient Dacian town of Troesmis was conquered by Lucius Pomponius Flaccus in about 15 AD, re-taken from the Getae and given to the Thracian king Rhescuporis II.

The city and fort were rebuilt and under Diocletian (r.284-305) was the legionary fortress of Legio II Herculia and from 337 was also garrisoned by the milites Secundi Constantini.

[9] It is included in the Itinerarium Antonini as between Beroe Piatra Frecăței and Arrubium which attests the presence of the Roman Legion Legio I Iovia.

In 1882 Desire More started excavations, and the stones from the ancient site were sold as construction materials in Galați and Brăila.

[13] Excavations have found two walled cities, the eastern of 120 x 145 m with three basilicas from the time of Justinian and defended by exterior towers and by a vallum and a ditch.

The later so-called Eastern (4th century) and the Western (Byzantine) walled cities are today the most prominent monuments at the site.