1126

By place

Byzantine Empire

• Summer - Emperor John II Komnenos re-confirms the treaty of 1082. This ends the hostilities with Hungary and Venice. John secures Braničevo, and recovers the region of Sirmium on the Danube, but is forced by Venice to renew the exclusive commercial privileges.

  Levant

• Spring - The Crusaders under Pons, count of Tripoli, attack the fortress of Rafaniya, which dominates the entry of the Buqaia from the Orontes Valley. They besiege the fortress for 18 days and capture it on March 31.
• Autumn - Bohemond II takes over his inheritance of the Principality of Antioch. He sails from Otranto with a Norman fleet of 24 ships, carrying a number of troops and horses. Bohemond lands at the port of St. Symeon early in October and is welcomed at Antioch.

  Europe

• February 18 - Battle of Chlumec: Duke Soběslav I defeats a German army under King Lothair III and his Moravian ally, Duke Otto II the Black. Soběslav becomes the head of the Bohemian Principality.
• March 8 - Queen Urraca of León dies after a 17-year reign. She is succeeded by her 21-year-old son Alfonso VII el Emperador who becomes king of León and Castile.
• Ragnvald Knaphövde, pretender to the Swedish throne, is killed by upset peasants at a local thing. Sweden is without a ruler, but Magnus I claims sovereignty over Gothenland.
• Summer - King Alfonso the Battler of Aragon and Navarre launches a campaign raid into Granada in Andalusia against the Almoravids.
• Winter - King Lothair III makes Henry X, duke of Bavaria to succeed his late father, Henry IX, who has died on December 13.

  England

• Shrewsbury Castle is granted by King Henry I to his second wife, Queen Adeliza of Louvain. The command of the castle is given to William FitzAlan.
• Rutherglen becomes one of the first of the Royal Burghs in Scotland.

  Asia

• Spring - In China, scholars and farmers demonstrate around the capital city of Kaifeng, for the restoration of a trusted military official, Li Gang. Small conflicts erupt between the protestors and the government.
• January 18 - Emperor Hui Zong of the Song Dynasty abdicates in favour of his eldest son, Qin Zong after a 24-year reign. Hui Zong assumes the honorary title of Taishang Huang.
• Jin–Song War: Jurchen forces reach the Yellow River Valley, two days after New Year. Remnants of the court flee south, including much of the populace, and communities such as the Kaifeng Jews.
• January 31 - Jurchen forces lay siege to Kaifeng. Qin Zong negotiates the terms of surrender, agreeing an annual indemnity. He orders Song forces to defend the prefectures of the Northern Song.

  By topic

Literature

• Adelard of Bath, an English philosopher, translates Muḥammad ibn Mūsā al-Khwārizmī's arithmetic and astronomical works into Latin.
• Two previously written Chinese pharmaceutical works, one by Shen Kuo and the another Su Shi, are combined in one written work.

  Religion

• Olegarius, archbishop of Tarragona, creates a community of knights, to combat the Almoravids in Catalonia.