257

year

AI overview

I don't have sufficient context to write an accurate overview of "257." The context provided only indicates "year," but I need more information about what "257" refers to—whether it's a historical year, a scientific measurement, an event, a publication, or something else—to give you an accurate and meaningful overview. Could you provide additional context about what "257" is?

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Wikidata facts

Instance of: year
Part of: 250s
Followed by: 258
Follows: 256

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Commons category: 257
topic's main category: Category:257
point in time: 0257-01-01
has list: list of state leaders in 257
category for births in this time period: Category:257 births
category for deaths in this time period: Category:257 deaths

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Encyclopedic overview

Golden Roman helmet found near Sirmium (Serbia)

Year 257 (CCLVII) was a common year starting on Thursday of the Julian calendar. At the time, it was known as the Year of the Consulship of Valerianus and Gallienus (or, less frequently, year 1010 Ab urbe condita). The denomination 257 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years.

Excerpted from Wikipedia’s “257” article, available under the CC BY-SA 4.0 licence.

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