Calendar overview 1121
|David the Builder destroy a numerically far superior army of the Seljuks in the Battle of Didgori .|
|1121 in other calendars|
|Armenian calendar||569/570 (turn of the year July)|
|Buddhist calendar||1664/65 (southern Buddhism); 1663/64 (alternative calculation according to Buddhas Parinirvana )|
|Chinese calendar||63rd (64th) cycle|
|Chula Sakarat (Siam, Myanmar) / Dai calendar (Vietnam)||483/484 (turn of the year April)|
|Iranian calendar||499/500 (around March 21)|
|Islamic calendar||514/515 (March 21-22)|
|Jewish calendar||4881/82 (September 14/15)|
|Seleucid era||Babylon: 1431/32 (turn of the year April)
Syria: 1432/33 (turn of the year October)
|Vikram Sambat (Nepalese Calendar)||1177/78 (turn of the year April)|
- April 22nd : Antipope Gregory VIII is captured and handed over to Pope Calixt II . He remains in prison until his death.
- August 12th : A Georgian army under their King David the Builder and his son Demetre annihilate a numerically superior army of the Seljuks under Ilghazi , the Emir of Aleppo, in the Battle of the Didgori . The outcome of the battle enabled the reconquest of Tbilisi and large parts of the Caucasus that were previously under Islamic domination. The victory, which contemporaries praised as a supernatural miracle, established the medieval heyday of Georgia and still occupies an important place in Georgian identity today.
- December 11th : al-Afdal Shahanshah , vizier in the Fatimid Empire, who as regent exercises absolute control over the empire, is assassinated on behalf of Caliph al-Amir . Officially, the murder was charged with a Nizarite assassination team .
- Ticino near Rostock is first mentioned in a document.
- The Přimda Castle is first mentioned in a document.
Exact date of birth unknown
- Margaret de Bohun , English nobleman
- Se Chilbupa Chökyi Gyeltshen , clergyman of Tibetan Buddhism († 1189 )
Born around 1121
- Henri de France, duc de Reims , Bishop of Beauvais, Archbishop and Duke of Reims and Peer of France († 1175 )
Date of death secured
- January 6th : Erminold , Benedictine abbot in the convent near Regensburg
- February 22nd : Werner IV. "Von Grüningen" , Count of Maden, Count of Neckargau and Burgrave of Worms (* around 1060 )
- April 16 : Hartmann I , Count of Dillingen
- April 23 : Jón Ögmundsson , Icelandic bishop (* 1052 )
- April 29 : Theoger von Sankt Georgen , abbot of St. Georgen in the Black Forest, monastery reformer and bishop of Metz (* around 1050 )
- August 7th : Ulrich I of Passau , founder of the monastery and bishop of the Diocese of Passau (* around 1027 )
- 11 December : al-Afdal Shahanshah , as vizier regent of the Fatimids (* around 1066 )
- December 13 : Ulrich von Eppenstein , Abbot of St. Gallen and Patriarch of Aquileia (* around 1055 )
- 28 / December 30 : Erlung , Bishop of Würzburg
Exact date of death unknown
- Al-Tughrai , Persian doctor, poet and alchemist (* 1061 )
- Wilhelm von Champeaux , philosopher and bishop of Châlons (* around 1070 )