Flavius Valerius Severus, also called Severus II, was a Roman emperor from 306 to 307. After failing to besiege Rome, he fled to Ravenna. It is thought that he was killed there or executed near Rome.
Aureus from 306 or 307 depicting Severus
Galerius Valerius Maximianus was Roman emperor from 305 to 311. During his reign he campaigned, aided by Diocletian, against the Sasanian Empire, sacking their capital Ctesiphon in 299. He also campaigned across the Danube against the Carpi, defeating them in 297 and 300. Although he was a staunch opponent of Christianity, Galerius ended the Diocletianic Persecution when he issued the Edict of Toleration in Serdica (Sofia) in 311.
Porphyry bust of Galerius, found in 1993 at Gamzigrad and held at the National Museum [sr] in Zaječar, Serbia.
Diocletian, Galerius' father-in-law and senior emperor
Detail of Galerius attacking Narseh on the Arch of Galerius at Thessaloniki, Greece, the city where Galerius carried out most of his administrative actions.
Aureus of Galerius, marked: "MAXIMIANVS NOB CAES / IOVI CONS CAES".