List of 1091 Major News Events in History, Most Important Historical Events in 1091
| Date | Event |
|---|---|
| April 29, 1091 | Battle of Levounion: The Pechenegs are defeated by Byzantine Emperor Alexios I Komnenos. |
| October 17, 1091 | London tornado of 1091: A tornado thought to be of strength T8/F4 strikes the heart of London. |