Diocletian tetrarchy and constantine i
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Diocletian, Tetrarchy, and Constantine I. by Dena Dianati, Sam Rubin, Jake Shepard, and Gwyne Henke. Dena . Diocletian. Background: Full name: Gaius Aurelius Valerius Diocletianus Augustus Birth name Diocles, born in 236 C.E. Came from a low family, very humble birth. Diocletian.

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Diocletian, Tetrarchy, and Constantine I

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Diocletian, Tetrarchy, and Constantine I

by Dena Dianati, Sam Rubin, Jake Shepard, and Gwyne Henke



  • Background:

    Full name: Gaius Aurelius Valerius Diocletianus Augustus

    Birth name Diocles, born in 236 C.E.

    Came from a low family, very humble birth


  • prudent officer who sought victory rather than glory

  • when a new emperor, Carus, comes to power in 282, Diocletian fallsunder his favor

  • promoted from officer to count of the domestics, commander of the cavalry, and the imperial body guard


  • later became a consulate through his favor

    Carus killed in 284 and his two sons replaced him, however one of them, who was ruling in the East, Numerian, died mysteriously and Diocletian replaced him.

  • The son ruling in the west, Carinus, was also killed in a battle, and Diocletian took control of the entire empire.

Jake and Sam

Crisis in the Third Century

  • Many barbarian revolts during Diocletian's reign

  • To make his wanted reforms, he had to divide the empire between two people

  • This resulted in Diocletian splitting the empire with Maximian and both of them had a sub-emperor to rule afterwards.


Tetrarchy: Division of the Empire

Green -- Diocletian

Purple-- Galerius

Yellow -- Maximian

Red -- Constantius



  • The Tetrarchy was very successful militarily: revolts and barbarians put down

  • The Tetrarchy also introduced a new coinage system that halted the

    economic decline

    occurring before the

    Tetrarchy was formed


End of the Tetrarchy

  • After Diocletian and Maximian resigned and Constantius died, the Tetrarchy began to fall apart

  • The sons of the former Tetrarchy members all vied for the 3 spots in a conflict that led to a civil war

  • The eventual winner of the civil war was Constantius' son....(see next slide)


Constantine I

  • 272 AD--337 AD

  • Diocletian's death

    • Father Constantius dies 306 AD

  • Ruled with Licinius

    • Licinius East, defeated 324

  • Converted to Christianity

    • "hoc signo victor eris"


Constantine I

  • Constantinople

    • Economic

    • Defensive

    • "New Rome"

  • Court system

    • Eastern style

  • Organization of Rome

    • Praefectures, dioceses, provinces, cities

  • Military

    • Praetorian guard

    • Report to emperor



Constantine I

  • Died 22 May 337 AD

    • "13th apostle"

  • Good impacts

    • Strengthens Rome

    • Modern system of imperialism

    • Endorses Christianity

  • Bad impacts

    • Huge taxes

    • No set successor




  • Diocletian ruled 284-305 AD

    • Invented the...

  • Tetrarchy

    • Which was ended by...

  • Constantine I

    • Who ruled from 306-337 AD








  • Diocletian





    Constantine I

    • Herbermann, Charles, and Georg Grupp. "Constantine the Great." The Catholic Encyclopedia. Vol. 4. New York: Robert Appleton Company, 1908. 13 Mar. 2013 <http://www.newadvent.org/cathen/04295c.htm>.

    • Kreis, Steven. "Constantine the Great, C.274-337." Constantine the Great, C.274-337. N.p., 11 Oct. 2006. Web. 28 Feb. 2013. <http://www.historyguide.org/ancient/constantine.html>

    • Morey, William C. Outlines of Roman History: For the Use of High Schools and Academies. New York: American Book, 1901. Print.

    • Pohlsander, Hans A. "Constantine I." Roman Emperors - DIR Constantine I. N.p., 1999. Web. 27 Feb. 2013. <http://www.roman-emperors.org/conniei.htm>


  • Tetrarchy

    Garstang, David. "Tetrarchy of Diocletian." Tetrarchy of Diocletian. Accessed February 26, 2013. http://www.garstang.us/emperors/tetofdiocletian.htm.

    King, Jay. "The Later Roman Empire: The Tetrarchy." The Later Roman Empire: The Tetrarchy. 2006. Accessed February 26, 2013. http://jaysromanhistory.com/romeweb/laterome/art5.htm.

    Lendering, Jona. "Tetrarchy." Tetrarchy. March 31, 2006. Accessed March 3, 2013. http://www.livius.org/te-tg/tetrarchy/tetrarchy.html.

    Morey, William C. Outlines of Roman History: For the Use of High Schools and Academies. New York: American Book, 1901. http://www.forumromanum.org/history/morey28.html.

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