Hardcover Paperback Pohlsander, Hans. The Emperor Constantine. London & New York: Routledge, 2004a. Hardcover Paperback Pohlsander, Hans. "Constantine I (306 – 337 AD)." De Imperatoribus Romanis (2004b). Accessed December 16, 2007. Potter, David S. The Roman Empire at Bay: AD 180–395. New York: Routledge, 2005. Hardcover Paperback Southern, Pat. The Roman Empire from Severus to Constantine. New York: Routledge, 2001. Rostovtzeff, Michael. The Social and Economic History of the Roman Empire. Oxford: Oxford University Press, 1966. Treadgold, Warren. A History of the Byzantine State and Society. Stanford: Stanford University Press, 1997. Williams, Stephen. Diocletian and the Roman Recovery. New York: Routledge, 1997. External links Medieval Sourcebook: Edict of Toleration by Galerius, 311. Gaius Galerius Valerius Maximianus Lactantius about Galerius in his "De Mortibus Persecutorum" chapter XXIII & XXVII Catholic Encyclopedia 250s births 311 deaths 3rd-century Roman consuls 3rd-century Roman emperors 4th-century Roman consuls 4th-century Roman emperors Caesars (heirs apparent) Deified Roman emperors Galerii People of the Roman–Sasanian Wars Tetrarchy Valerii Roman emperors to suffer posthumous denigration or damnatio memoriae Roman pharaohs Illyrian emperors