|Centuries:||11th century – 12th century – 13th century|
|Decades:||1090s 1100s 1110s – 1120s – 1130s 1140s 1150s|
|Years:||1124 1125 1126 – 1127 – 1128 1129 1130|
- Estimation: Constantinople, capital of the Byzantine Empire, becomes the largest city in the world, taking the lead from Kaifeng, capital of China.
- January 9 – Jurchen forces sack the Song Chinese capital of Kaifeng (the Jingkang Incident, 靖康事變), and begin more than a century of political division between northern and southern China.
- Conrad III establishes the Hohenstaufen dynasty when he is crowned antiking to the Holy Roman Emperor, Lothair II.
- The first coalition of the Norman princes against Roger II of Sicily is formed. The same year, Roger regains control over Malta after a rebellion. To guaranty the security of the seas, the king also establishes a pact with the maritime republic of Savona, probably following an Almoravid raid against his realm.
- Count Charles the Good of Flanders is assassinated.
- First mention of the consuls in Brescia, indicating that the city has become an independent commune.
- The commune of Milan conquers the neighboring city of Como.
- Abulafia, David (1985). The Norman kingdom of Africa and the Norman expeditions to Majorca and the Muslim Mediterranean. Woodbridge: Boydell Press. ISBN 0-85115-416-6.
- Bresc, Henri (2003). La Sicile et l'espace libyen au Moyen Age. http://www.storiamediterranea.it/public/md1_dir/b1462.pdf. Retrieved 17 January 2012.
- Johns, Jeremy (2002). Arabic administration in Norman Sicily: the royal dīwān. Cambridge: Cambridge University Press. p. 85. ISBN 0-521-81692-0.
- Annals of the Four Masters. Ireland: Corpus of Electronic Texts (UCC), Annal M1127.1. 1127.