The Jingkang incident
The Jurchens take the Song capital and two emperors captive

The army of the Jurchen Jin empire took Kaifeng and carried north Emperor Qinzong, his father Huizong and thousands of courtiers. The Song lost all of northern China. A surviving prince founded the Southern Song with its capital at Hangzhou, and the border with the Jin ran along the Huai River.
Wikipedia (Russian) · Wikipedia (English) · 12th century
Meanwhile around the world (±25 years)
Eastern Europe & Russia
- 1113 Vladimir Monomakh in Kiev — 14 years earlier
- c. 1113 The Primary Chronicle — 14 years earlier
- 1136 The Novgorod Republic — 9 years later
Africa
- 1147 The Almohads take Marrakesh — 20 years later
Alive at the time
- Omar Khayyam (aged 79)
- Hildegard of Bingen (aged 29)
- Yuri Dolgoruky (aged 28)
- Andrey Bogolyubsky (aged 16)
- Averroes (Ibn Rushd) (aged 1)
- Henry I Beauclerc (aged 59)
- Lothair III (aged 52)
- Mstislav the Great (aged 51)
- Louis VI the Fat (aged 46)
- Anna Komnene (aged 44)