1121
| 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 |
| 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 | 阳金鼠年 (male Iron-Rat) 1247 or 866 or 94 — to — 阴金牛年 (female Iron-Ox) 1248 or 867 or 95 |
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.
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.