Europe, 01 May 305: Second Tetrarchy
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Political map of Europe & the Mediterranean on 01 May 305 (Diocletian and the Tetrarchy: Second Tetrarchy), showing the following events: Battle of Vindonissa; Great Persecution; Arsacid Albania; Afrighid Kingdom; Second Tetrarchy; Reign of Galerius.

R o m a n E m p i r eConstantius & Galerius

F i n n o - U g r i c P e o p l e s

Sasanian
Persian EmpireHormizd II

( Galerius )augustus

( Constantius )augustus

( Maximinus Daza )caesar

PannoniaeR. diocese

TervingiR. client

Kushano-
Sasanian
Kingdom

ThraciaeR. diocese

PonticaR. diocese

ViennensisR. diocese

GalliaeR. diocese

AsianaR. diocese

OriensR. diocese

AfricaR. diocese

( Valerius Severus )caesar

MoesiaeR. diocese

ArmeniaR. client

HispaniaeR. diocese

BritanniaeR. diocese

ItaliaR. diocese

Bosporan
KingdomR. client

S a r m a t i a n s

ColchisR. client

Lakhmid K.Per. vas.

BaquatesR. client

Tanukhid K.R. client

Wielbark
Culture

IberiaR. client

AlbaniaR. client

Marco-
manniR. client

Alem-
anniR. client

Przeworsk
culture

Rhysaddir?Hisp.

Aug. Treverorum

302?Constantius defeats
Alemanni at Vindonissa

Feb 303–Apr 311Widespread persecution
of Christians under
Diocletian and Galerius

303?Albania becomes
Roman client state

305Afrighids gain control
in Khwarazm

1 May 305Diocletian and Maximian
resign in favor of
Constantius and Galerius

1 May 305–? May 311Galerius presides
over Roman Empire;
Tetrarchy breaks down

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