|557 by topic|
|Ab urbe condita||1310|
|Balinese saka calendar||478–479|
|Chinese calendar||丙子年 (Fire Rat)|
3253 or 3193
— to —
丁丑年 (Fire Ox)
3254 or 3194
|- Vikram Samvat||613–614|
|- Shaka Samvat||478–479|
|- Kali Yuga||3657–3658|
|Iranian calendar||65 BP – 64 BP|
|Islamic calendar||67 BH – 66 BH|
|Minguo calendar||1355 before ROC|
|Seleucid era||868/869 AG|
|Thai solar calendar||1099–1100|
683 or 302 or −470
— to —
684 or 303 or −469
Year 557 (DLVII) was a common year starting on Monday (link will display the full calendar) of the Julian calendar. The denomination 557 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.
- The Avars arrive in the northern region of the Caucasus, between the Black Sea and the Caspian Sea. They send envoys to the Byzantines in Lazica (modern Georgia). Like the Huns, the Avars are the former elite of a central Asian federation, which has been forced to flee westwards.
- December 14 – The 557 Constantinople earthquake occurs.
- The Western Wei dynasty ends: Yuwen Hu deposes emperor Gong Di, and places Yuwen Tai's son Xiaomin on the throne. Yuwen Hu becomes regent and establishes the Northern Zhou dynasty in China.
- Ming Di is made emperor, after his younger brother Xiao Min Di is arrested while trying to assume power. Xiao Min Di is deposed and executed by Yuwen Hu.
- The Liang dynasty ends: Chen Wu Di, a distinguished general, becomes the first emperor of the Chen dynasty in Southern China.
- The Göktürks under Muqan Qaghan ally with the Persian Empire, and destroy the Hephthalites (White Huns) in Central Asia.
- King Chlothar I of the Franks founds the Abbey of St. Medard at Soissons (Northern France).
- The Jiming Temple in Nanjing is built; the Buddhist pagoda is located near Xuanwu Lake.
- Dushun, Chinese (Buddhist) patriarch (d. 640)
- Gao Wei, emperor of Northern Qi (d. 577)
- Ouyang Xun, Confucian scholar (d. 641)
- March 14 – Leobinus, bishop of Chartres
- exact date unknown
- Rome at War (AD 293—696), p. 59. Michael Whitby, 2002. ISBN 1-84176-359-4
- Panayiotis Tzamalikos (8 June 2012). The Real Cassian Revisited: Monastic Life, Greek Paideia, and Origenism in the Sixth Century. BRILL. pp. 135–. ISBN 90-04-22440-8.
- Jinhua Chen (2002). Monks and monarchs, kinship and kingship: Tanqian in Sui Buddhism and politics. Scuola italiana di studi sull'Asia orientale. ISBN 978-4-900793-21-7.