| Siege of Constantinople | |||||
|---|---|---|---|---|---|
&sq=&lang=&file=File:AntonoffKrum.jpg) Drawing depicting Krum | |||||
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| Belligerents | |||||
| First Bulgarian Empire | Byzantine Empire | ||||
| Commanders and leaders | |||||
| Krum # | Leo V | ||||
The siege of Constantinople in 813 (Bulgarian: Обсада на Константинопол) by Khan Krum (Bulgarian: Крум) was a failed attempt to take the city during the Bulgarian-Byzantine wars.