1266

1266 in other calendars
Gregorian calendar	1266; MCCLXVI
Ab urbe condita	2019
Armenian calendar	715; ԹՎ ՉԺԵ
Assyrian calendar	6016
Balinese saka calendar	1187–1188
Bengali calendar	673
Berber calendar	2216
English Regnal year	50 Hen. 3 – 51 Hen. 3
Buddhist calendar	1810
Burmese calendar	628
Byzantine calendar	6774–6775
Chinese calendar	乙丑年 (Wood Ox); 3962 or 3902; — to —; 丙寅年 (Fire Tiger); 3963 or 3903
Coptic calendar	982–983
Discordian calendar	2432
Ethiopian calendar	1258–1259
Hebrew calendar	5026–5027
Hindu calendars
- Vikram Samvat	1322–1323
- Shaka Samvat	1187–1188
- Kali Yuga	4366–4367
Holocene calendar	11266
Igbo calendar	266–267
Iranian calendar	644–645
Islamic calendar	664–665
Japanese calendar	Bun'ei 3; (文永３年)
Javanese calendar	1176–1177
Julian calendar	1266; MCCLXVI
Korean calendar	3599
Minguo calendar	646 before ROC; 民前646年
Nanakshahi calendar	−202
Thai solar calendar	1808–1809
Tibetan calendar	阴木牛年; (female Wood-Ox); 1392 or 1011 or 239; — to —; 阳火虎年; (male Fire-Tiger); 1393 or 1012 or 240

Millennium:	2nd millennium
Centuries:	12th century – 13th century – 14th century
Decades:	1230s 1240s 1250s – 1260s – 1270s 1280s 1290s
Years:	1263 1264 1265 – 1266 – 1267 1268 1269

1266 (MCCLXVI) was a common year starting on Friday of the Julian calendar, the 1266th year of the Common Era (CE) and Anno Domini (AD) designations, the 266th year of the 2nd millennium, the 66th year of the 13th century, and the 7th year of the 1260s decade. As of the start of 1266, the Gregorian calendar was 7 days ahead of the Julian calendar, which was the dominant calendar of the time.

Events

February 26 – In the Battle of Benevento, an army led by Charles, Count of Anjou, defeats a combined German and Sicilian force led by King Manfred of Sicily. Manfred is killed in the battle and Pope Clement IV invests Charles as king of Sicily and Naples.
July – Mary de Ferrers ordered to surrender land and Liverpool Castle to Edmund, second son of Henry III.
October – In England, the Second Barons' War winds down as supporters of the slain rebel leader Simon de Montfort make an offer of peace to the king in the Dictum of Kenilworth; after slight modifications to the peace settlement, it is agreed to the following year.
The war between Scotland and Norway ends as King Alexander III of Scotland and King Magnus VI of Norway agree to the Treaty of Perth, which cedes the Western Isles and Isle of Man to Scotland in exchange for a large monetary payment.
In France, the gold écu and silver grosh coins are minted for the first time.

Niccolo and Maffeo Polo, brother and uncle of Marco Polo reach Kublai Khan's capital Khanbaliq (now Beijing) in China, setting the stage for Marco's famous expedition starting five years later. Kublai Khan sends the Polos back with a message requesting the pope dispatch western scholars to teach in the Mongol Empire; however, this request is largely ignored.
The Mamluk sultan Baibars expands his domain, capturing the city of Byblos (in present-day Lebanon) and the important castle of Toron from crusader states, and defeating the Armenians at Cilicia.

February 26 – King Manfred of Sicily
October 21 – Birger jarl, Swedish regent and founder of Stockholm (born about 1210)
Berke, khan of the Golden Horde
Hugh Bigod, Justiciar of England
Ariq Boke, regent of the Mongol Empire
Eudes of Burgundy, Count of Nevers (born 1230)
John of Ibelin, jurist of the Kingdom of Jerusalem (born 1215)
Duke Świętopełk II of Pomerania
Marie de Saint-Clair, grand master of the Priory of Sion
May 7 — Farid-ud-din Ganj Shakar