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	???????
	Portrait of the Four Tetrarchs , two porphyry sculptures looted from the Philadelphion of Constantinople after 1204, now standing at the southwest corner of St Mark's Basilica , ????
Chronology
?????????? ???? ?????	284?286
? ?? ????????? ???? ????	285?286
????????? ??? ?????????? ; ???? ??? ???? ?? ????? ?? ??? ??	286?305
? with Constantius I & Galerius ; as Caesares	293?305
Constantius I & Galerius ; as Augusti of West and East	305?306
? with Severus II & Maximinus II ; as Caesares
Severus II and Galerius as Augusti of West and East	306?307
? with Maximinus II and ??????? ???? as Caesares
Maxentius & ????????? as usurpers in Italy and Africa	306?308
Galerius as Augustus	307?308
? with Maximinus II as Caesar
? with ??????? ???? as ; self-proclaimed Augustus
???????? & Galerius ; as Augusti of West and East	308?311
? with Maximinus II and ??????? ???? as Caesares
Maxentius as usurper in Rome (and Asia Minor 311?312)	308?312
???????? & Maximinus II ; as Augusti of West and East	311?313
? with ??????? ???? as ; self-proclaimed Augustus
??????? ???? & ???????? ; as Augusti of West and East	313?324
? with Licinius II , ??????? ??? & Crispus as Caesares
? with Valerius Valens as ; Augustus of the West	316?317
? with Martinian as ; Augustus of the West	324
Succession
Preceded by ; ????? ??? ?? ?????	Followed by ; Constantinian dynasty

??????? (Tetrarchy) ?? ?? ???? ??? ?? ???? ?????? ???????????? 293 ????? ??? ???? ???? ????? ?? ?? ????????? ????? (???) ??? ?? ?? ?????? ??????? ??? ????? ????????? ???? (???) ?? ?????? ????? ???? ????? ???? ?? ??? ???? ??? ????

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Timothy D. Barnes (1984)? Constantine and Eusebius ? Harvard University Press? ISBN 0674165314
Alan Bowman (1939)? The Cambridge Ancient History Volume 12, The Crisis of Empire, AD 193?337 ? Cambridge University Press? ISBN 9780521044943
Simon Corcoran (2000)? The Empire of the Tetrarchs, Imperial Pronouncements and Government AD 284?324 ? Oxford University Press? ISBN 019815304X
Frank Kolb (2011)? Diocletian und die Erste Tetrarchie: Improvisation oder Experiment in der Organisation monarchischer Herrschaft? (????? ?????)? Berlin: de Gruyter? ISBN 978-3110846508
Wolfgang Kuhoff (2001)? Diokletian und die Epoche der Tetrarchie: Das romische Reich zwischen Krisenbewaltigung und Neuaufbau (284?313 n. CHR.) ? Frankfurt am Main: Lang? ISBN 978-3631367926
William Lewis Leadbetter (2009)? Galerius and the Will of Diocletian ? London; New York: Routledge? ISBN 978-1135261320
Roger Rees (2004)? Diocletian and the Tetrarchy ? Edinburgh: Edinburgh University Press? ISBN 978-0748616602

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