257

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Millennium: 1st millennium
Centuries:
Decades:
Years:
257 in various calendars
Gregorian calendar257
CCLVII
Ab urbe condita1010
Assyrian calendar5007
Balinese saka calendar178–179
Bengali calendar−336
Berber calendar1207
Buddhist calendar801
Burmese calendar−381
Byzantine calendar5765–5766
Chinese calendar丙子(Fire Rat)
2953 or 2893
    — to —
丁丑年 (Fire Ox)
2954 or 2894
Coptic calendar−27 – −26
Discordian calendar1423
Ethiopian calendar249–250
Hebrew calendar4017–4018
Hindu calendars
 - Vikram Samvat313–314
 - Shaka Samvat178–179
 - Kali Yuga3357–3358
Holocene calendar10257
Iranian calendar365 BP – 364 BP
Islamic calendar376 BH – 375 BH
Javanese calendar136–137
Julian calendar257
CCLVII
Korean calendar2590
Minguo calendar1655 before ROC
民前1655年
Nanakshahi calendar−1211
Seleucid era568/569 AG
Thai solar calendar799–800
Tibetan calendar阳火鼠年
(male Fire-Rat)
383 or 2 or −770
    — to —
阴火牛年
(female Fire-Ox)
384 or 3 or −769
Golden Roman helmet found near Sirmium (Serbia)

Year 257 (CCLVII) was a common year starting on Thursday (link will display the full calendar) 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.

Events[edit]

By place[edit]

Roman Empire[edit]

By topic[edit]

Religion[edit]

  • August 30Pope Sixtus II succeeds Pope Stephen I as the 24th pope.
  • Valerian's persecution of Christians begins: his edict orders bishops and priests to sacrifice according to the pagan rituals, and prohibits Christians, under penalty of death, from meeting at the tombs of their deceased.

Births[edit]

Deaths[edit]

References[edit]