1121

1121 (MCXXI) was a common year starting on Saturday of the Julian calendar, the 1121st year of the Common Era (CE) and Anno Domini (AD) designations, the 121st year of the 2nd millennium, the 21st year of the 12th century, and the 2nd year of the 1120s decade. As of the start of 1121, the Gregorian calendar was 7 days ahead of the Julian calendar, which was the dominant calendar of the time.

Millennium:	2nd millennium
Centuries:	11th century – 12th century – 13th century
Decades:	1090s  1100s  1110s  – 1120s –  1130s  1140s  1150s
Years:	1118 1119 1120 – 1121 – 1122 1123 1124

1121 in other calendars

Gregorian calendar	1121 MCXXI
Ab urbe condita	1874
Armenian calendar	570 ԹՎ ՇՀ
Assyrian calendar	5871
Balinese saka calendar	1042–1043
Bengali calendar	528
Berber calendar	2071
English Regnal year	21 Hen. 1 – 22 Hen. 1
Buddhist calendar	1665
Burmese calendar	483
Byzantine calendar	6629–6630
Chinese calendar	庚子年 (Metal Rat) 3817 or 3757     — to — 辛丑年 (Metal Ox) 3818 or 3758
Coptic calendar	837–838
Discordian calendar	2287
Ethiopian calendar	1113–1114
Hebrew calendar	4881–4882
Hindu calendars
- Vikram Samvat	1177–1178
- Shaka Samvat	1042–1043
- Kali Yuga	4221–4222
Holocene calendar	11121
Igbo calendar	121–122
Iranian calendar	499–500
Islamic calendar	514–515
Japanese calendar	Hōan 2 (保安２年)
Javanese calendar	1026–1027
Julian calendar	1121 MCXXI
Korean calendar	3454
Minguo calendar	791 before ROC 民前791年
Nanakshahi calendar	−347
Seleucid era	1432/1433 AG
Thai solar calendar	1663–1664
Tibetan calendar	ལྕགས་ཕོ་བྱི་བ་ལོ་ (male Iron-Rat) 1247 or 866 or 94     — to — ལྕགས་མོ་གླང་ལོ་ (female Iron-Ox) 1248 or 867 or 95

Events

• Concordat of Worms condemns Pierre Abélard's writings on the Holy Trinity. Later in the year, Canon Fulbert (not to be confused with Fulbert of Chartres (960-1028)), uncle of Heloise, has Abélard castrated.
• Reading Abbey is founded.
• David the Builder, King of Georgia, with the army of 55,000 defeats the 200,000-strong Muslim coalition troops at Didgori, Eastern Georgia.

Deaths

• December 11 — Al-Afdal Shahanshah, Caliph of Egypt (b. 1066)
• William of Champeaux, French philosopher
• Zhou Tong, archery teacher and second military arts tutor of famous Song Dynasty General Yue Fei.