* 1121 – Battle of Didgori: the Georgian army under King David IV wins a decisive victory over the famous Seljuk commander Ilghazi.

* 1121 – Dirk VI becomes the Count of Holland.

* Ulrich of Eppenstein ( 1077 – 1121 )

* Manegold of Mammern ( 1121 – 1133 )

* Heinrich von Twiel ( 1121 – 1122 ) Anti-Abbot

* March 13 – Mieszko III, king of Poland ( b. c. 1121 )

William the Aetheling having perished in the wreck of the White Ship ( 25 November 1120 ), Fulk, on his return from a pilgrimage to the Holy Land ( 1120 – 1121 ), married his second daughter Sibyl, at the instigation of Louis VI, to William Clito, son of Robert Curthose, and a claimant to the duchy of Normandy, giving her Maine for a dowry ( 1122 or 1123 ).

In the years 1121 – 1122 Pomerania became a Polish fief and a local strongman, Prince Wartislaw I swore feudal allegiance to the Polish monarch and undertook to pay a yearly tribute of 500 marks of silver to Poland ( One mark of silver was equal to 240 denarii.

In 1119 – 1121 John defeated the Seljuq Turks, establishing his control over southwestern Anatolia.

**# Henry ( 1121 – 75 ), archbishop of Reims

* Alfonso ( b. 1120 / 1121 – d. 10 October 1144 ), Prince of Capua ( from 1135 ) and Duke of Naples ;

164 ( 11 ): 1121 – 1123.

Adeliza of Louvain, sometimes known in England as Adelicia of Louvain, also called Adela and Aleidis ; ( c. 1103 – 23 April 1151 ) was queen consort of the Kingdom of England from 1121 to 1135, the second wife of Henry I.

** Third son: Imperial Prince Koreaki ( 惟明親王 ) ( 1172 – 1121 ), later Imperial Prince and Monk Shōen ( 聖円入道親王 )

* William of Champeaux ( 1070 – 1121 ), French philosopher and theologian

* Alpheus: A river associated with Olympia, home of The Olympic Games – a breathless, gasping runner is said to be breathing it ( line 1121 ).

* P. 1121 – a Hawker project

| width = auto | Floris IIthe Fat1091 – 1121

In the winter of 1120 – 1121 the Georgian troops successfully attacked the Seljuk settlements on the eastern and southwestern approaches to the Transcaucasus.

In 1121, Sultan Mahmud b. Muhammad ( 1118 – 1131 ) declared a holy war on Georgia and rallied a large coalition of Muslim states led by the Artuqid Najm al-din El-ğazi and Toğrul b. Muhammad.

Guillaume de Champeaux ( c. 1070 – 18 January 1121 in Châlons-en-Champagne ), also known as William of Champeaux ( English ) or Guglielmus de Campellis ( Latin ), was a French philosopher and theologian.

* 1121 – Al-Khazini: variation of gravitation and gravitational potential energy at a distance ; the decrease of air density with altitude

* 1121 – Al-Khazini makes extensive use of the experimental method to prove his theories on mechanics in The Book of the Balance of Wisdom

* Hugh le Roux ( 1121 – 1171 )

Al-Khazini, in The Book of the Balance of Wisdom ( 1121 ), invented a hydrostatic balance.

At the Congress of Würzburg in 1121 Otto successfully negotiated the peace treaty, the Concordat of Worms, which was signed in 1122 at Worms.

Second, certain sections before 1118 have been shown to make use of Eadmer's Historia novorum, which was not completed before 1121 x 1124.

It is in the civil parish of Huntwick with Foulby and Nostell, which has a population of 90, and is the site of an Augustinian priory which received its charter in 1121.

( Orderic Vitalis ) He returned, late in 1121, after which he began to subsidize the Templars, maintaining two knights in the Holy Land for a year.

Evidence of monastic buildings from the years immediately following the conquest can still be seen surrounding Tewkesbury Abbey, which was begun in 1090 and consecrated on 23 October 1121.

Henry II bestowed the minster and its estates on Reading Abbey, which founded a priory at Leominster in 1121, although there was one here from Saxon times.

In the area of Gryfice the Battle of Niekładź took plcace in 1121, in which Polish ruler Bolesław III Krzywousty defeated Wartislaw I, Duke of Pomerania and Swantopolk I, Duke of Pomerania

* Z is the earliest known recension of the Sic et non, which, according to Constant Mews, dates to 1121.

* TCEB and S belong to the next earliest recension of the Sic et non, which dates to 1121 – 1126.

* DL belong to an intermediate recension of the Sic et non, which likewise dates to the period 1121 – 1126.

Built over a Norman cathedral built in 1121, in the 16th century it received a Renaissance façade which was however destroyed in 1638.

In an ever changing world, adaptive management appeals to many practices seeking sustainable solutions by offering a framework for decision making that proposes to support a sustainable future which, “ conserves and nurtures the diversity — of species, of human opportunity, of learning institutions and of economic options ”( The Environmental Advisory Council, 2002, p. 1121 ).

In 1121, King Henry I founded Reading Abbey which grew to become one of the most important religious and political centres of England.

As her reputation for holiness and her visionary gifts became widely known, a number of other women gathered around her at Markyate, which had been left to her by Roger when he died in 1121 or 1122.

To atone for her father and husband, Berta von Iringsburg and her sons Otto and Eberhard founded an Augustine monastery in 1121, which is now in the hands of the Salesians of Don Bosco.

This followed an attempt in around 1121 to remove his remains to another monastery, which came to nothing.

From its early years, the school used a room in St Nicholas ' Church, which itself was built between 1121 and 1184.