The Ostromir Gospels
The oldest precisely dated East Slavic book

Deacon Grigory copied the Gospels for Ostromir, the governor of Novgorod, and dated his work 1056–1057. The parchment book with vivid miniatures is kept in the National Library of Russia in St Petersburg.
Wikipedia (Russian) · Wikipedia (English) · 11th century
Meanwhile around the world (±25 years)
Europe
- 1066 Battle of Hastings — 9 years later
- 1066 Halley's Comet over England — 9 years later
- 1077 Walk to Canossa — 20 years later
Middle East
- 1054 East–West Schism — 3 years earlier
Africa
- c. 1070 The Almoravids found Marrakesh — 13 years later
Asia
- 1044 First gunpowder formulas in the Wujing Zongyao — 13 years earlier
- 1054 Supernova SN 1054 — 3 years earlier
Alive at the time
- Edward the Confessor (aged 54)
- William the Conqueror (aged 29)
- Omar Khayyam (aged 9)
- Henry IV (aged 7)
- Vladimir II Monomakh (aged 4)
- Henry I (aged 49)
- Iziaslav I (aged 33)
- Vsevolod I (aged 27)
- Shen Kuo (aged 26)
- Sviatopolk II (aged 7)