Council of Liubech
Princes make peace but lock Rus' into hereditary fiefs

On 19 October 1097 the princes of Rus' met at Liubech to end their feuds. They proclaimed that 'each shall keep his patrimony', entrenching the division of Rus' into hereditary principalities.
Wikipedia (Russian) · Wikipedia (English) · 11th century
Meanwhile around the world (±25 years)
Europe
- 1077 Walk to Canossa — 20 years earlier
- c. 1088 University of Bologna — 9 years earlier
Middle East
- 1099 Crusaders capture Jerusalem — 2 years later
Asia
- c. 1113–1150 Construction of Angkor Wat — 16 years later
Alive at the time
- Omar Khayyam (aged 49)
- Henry IV (aged 47)
- Vladimir II Monomakh (aged 44)
- Sviatopolk II (aged 47)
- Philip I (aged 45)
- Nestor the Chronicler (aged 41)
- William II Rufus (aged 41)
- Al-Ghazali (aged 39)
- Henry I Beauclerc (aged 29)
- Lothair III (aged 22)