308

Centuries: 3rd century - 4th century - 5th century

Decades: 250s 260s 270s 280s 290s - 300s - 310s 320s 330s 340s 350s

Years: 303 304 305 306 307 - 308 - 309 310 311 312 313

• November 11 - The Congress of Carnuntum: Attempting to keep peace within the Roman Empire, the leaders of the Tetrarchy delcare Maxentius Augustus, and rival contender Constantine I is declared Caesar (junior emperor of Britain and Gaul)

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Deaths