伽列里乌斯，全名盖乌斯·伽列里乌斯·瓦列里乌斯·马克西米安努斯（Gaius Galerius Valerius Maximianus ，约260年－311年），四帝共治制時期的罗马帝国皇帝戴克里先的女婿，後亦為罗马帝国东部副皇帝，公元305年－311年在位。出生在今天塞尔维亚的加姆济格勒－罗慕利亚纳地方。后来他在这里建筑了自己的皇宫，他的皇宫遗迹在2007年被列为世界文化遗产。
311年伽列里烏斯重病，痛苦萬分，四月頒佈寬容詔諭（edict of toleration），要求基督徒為他的重病禱告，然而六天後他還是不治去世。他死后，李锡尼和马克西米努斯迅速决裂。
參考資料
^The earlier dates for Galerius' appointment have been argued for based on the suggestion that the appointments of Constantius and Galerius were timed to coincide (Barnes 1981, 8–9; Southern 1999, 146). Barnes (1982, 62) argues against a dating of 21 May 293 in Nicomedia originating in Seston, Dioclétien, 88ff., stating that the evidence adduced (the Paschal Chronicle 521 = Chronica Minora 1.229 and Lactantius, DMP 19.2) is invalid and confused. Lactantius is commenting on Diocletian and the place where Diocletian was acclaimed, and that the "Maximianus" in the text is therefore a later gloss; the Paschal Chronicle is not authoritative for this period for events outside Egypt, and may simply be commenting on the day when the laureled image of the new emperors arrived in Alexandria. Potter (2004, 650) agrees that locating the acclamation to Nicomedia is false, but believes that Seston's other evidence makes a strong case for a temporal lag between the two Caesars' acclamations.
