Centuries: 10th century - 11th century - 12th century
- Henry I becomes King of England.
- Baldwin I becomes King of Jerusalem.
- Baldwin of Bourcq becomes Count of Edessa.
- Bohemund I of Antioch is captured by the Danishmends, leaving Tancred of Hauteville as regent of the Principality of Antioch.
- Dagobert of Pisa becomes Latin Patriarch of Jerusalem.
- The cities of Kalmar, Kungälv, and Varberg, Sweden are chartered.
- Approximate date of the invention of checkers.
- Approximate date of the rise of the Anasazi culture.
- Geoffrey of Monmouth (approximate date)
- Herman of Carinthia (approximate date)
- Pope Adrian IV (approximate date)
- Albert I of Brandenburg (approximate date)