List of 811 Major News Events in History, Most Important Historical Events in 811
| Date | Event |
|---|---|
| July 23, 811 | Byzantine emperor Nikephoros I plunders the Bulgarian capital of Pliska and captures Khan Krum's treasury. |
| July 26, 811 | Battle of Pliska: Byzantine Emperor Nikephoros I is killed and his heir Staurakios is seriously wounded. |