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

1121 by topic
Leaders
Political entities State leaders Religious leaders
Birth and death categories
Births – Deaths
Establishments and disestablishments categories
Establishments – Disestablishments
Art and literature
1121 in poetry
v t e

1121 in various 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) 3818 or 3611 — to — 辛丑年 (Metal Ox) 3819 or 3612
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

Year 1121 (MCXXI) was a common year starting on Saturday (link will display the full calendar) of the Julian calendar.

Events

Emperor John II (Komnenos) recovers southwestern Anatolia (modern Turkey) from the Seljuk Turks and then hastens to the Balkans, where the Pechenegs are continuing their incursions. He transfers Byzantine troops to the Danube frontier at Paristrion.

Summer – Seljuk forces under Toghtekin make extensive raids into Galilee. King Baldwin II, in reprisal, crosses the Jordan River with a Crusader army, and ravages the countryside. He occupies and destroys a fortress that Toghtekin has built at Jerash.^[1]

March 2 – Petronilla of Lorraine becomes regent of Holland (Low Countries) after her husband, Floris II (the Fat) dies. He is succeeded by his 6-year-old son Dirk VI (or Theodoric).
A large rebellion takes place in Córdoba (modern Spain) against the ruling Almoravid Dynasty.^[2]

January 24 – Adeliza of Louvain, age 17, marries King Henry I two months after the accidental death of the heir to the English throne, Henry's only legitimate son, William Adelin.

Summer – Sultan Mahmud II of the Seljuk Empire declares a Holy War on Georgia. He sends an expedition under Najm ad-Din Ilghazi ibn Artuq, the Artukid ruler of Mardin, to invade Georgia.
August 12 – Battle of Didgori: King David IV (the Builder) of Georgia, with a Georgian army (55,600 men), defeats the 300,000-strong Seljuk coalition forces at Mount Didgori.

Emperor Hui Zong sends an expedition to crush the rebellion at Hangzhou (modern-day Zhejiang) in China. The rebels are defeated, their leader Fang La is captured and executed.

Spring – Peter Abelard, a French theologian and philosopher, is condemned and charged with the heresy of Sabellius in a synod at Soissons. Abelard writes Sic et Non.
April 22 – Antipope Gregory VIII (supported by Emperor Henry V) is arrested by papal troops at Sutri. He is taken to Rome and imprisoned in the Septizonium.
December 25 (Christmas Day) – The Praemonstratensian Order (Norbertines) is formed, when a group of canons make solemn vows at Prémontré.^[3]
Henry I founds Reading Abbey in England. The Cluniac Order populates the abbey.
The third and largest church is completed at Cluny Abbey (modern France).^[4]
L'Aumône Abbey is founded by Count Theobald IV of Blois at Loir-et-Cher.^[5]

Births