340s
Decade
The 340s decade ran from January 1, 340, to December 31, 349.
Events
340
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341
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342
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343
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344
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345
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346
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347
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348
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349
{{#section-h::AD 349|Events}}
Significant people
- Constans, Roman Emperor
- Constantius II, Roman Emperor
- Flavius Philippus, praetorian prefect of the East, consul
- Hypatia of Alexandria