mint When Constantius died in Britain in July 306, his son
Constantine I was immediately acclaimed emperor by his soldiers. At the same time, Severus was promoted to
augustus by
Galerius. Lactantius reports that Galerius had done this to promote the older man to the higher office, while accepting the imperial symbols of Constantine and accepting him as a member of the
Tetrarchy, albeit with the rank of
caesar. When
Maxentius, the son of the retired emperor
Maximian, revolted at
Rome in October, Galerius sent Severus to suppress the rebellion. Severus moved towards Rome from his capital,
Mediolanum, at the head of an army previously commanded by Maximian. Despite Maximian's assurance, Severus was nonetheless displayed as a captive and later imprisoned at
Tres Tabernae, near the current
Cisterna di Latina. One belief is that when Galerius himself invaded Italy to suppress Maxentius and Maximian, the former ordered Severus's death. The position of Western
augustus remained officially vacant until the
Conference of Carnuntum of November 308, in which
Licinius was appointed as new emperor (although his western domains only consisted of the
Balkan Peninsula). Severus was survived by his son
Flavius Severianus, but he was later executed by Licinius for treason. ==References==