List of Heads of State 303
Overview
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Other events
Africa
Asia
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Armenia
- King : Trdat III. (293-330)
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Iberia (Kartlien)
- King : Mirian III. (284-361)
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India
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Vakataka
- King : Pravarasena I (284–344)
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Vakataka
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Sassanid Empire
- Shah (Great King) : Hormizd II. (302–309)
Europe
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Bosporan Empire
- King : Thothorses (285 / 286–308 / 309)
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Roman Empire
- Emperor of the Tetrarchy : Diocletian (284–305)
- Emperor of the Tetrarchy : Maximian (286–305)
- Emperor of the Tetrarchy : Constantius I (293–306)
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Emperor of the Tetrarchy : Galerius (293–311)
- Consul : Diocletian (303)
- Consul : Maximian (303)