Byzantine–Bulgarian treaty of 815
The Treaty of 815 was a 30-year peace agreement signed in Constantinople between the Bulgarian Khan Omurtag and the Byzantine Emperor Leo V the Armenian.
Territory of the First Bulgarian Empire in the early 9th century.
Leo V the Armenian.
The Bulgarian ruler Omurtag sends delegation to the Byzantine emperor.
Khan Omurtag.
The First Bulgarian Empire was a medieval state that existed in Southeastern Europe between the 7th and 11th centuries AD. It was founded in 680–681 after part of the Bulgars, led by Asparuh, moved south to the northeastern Balkans. There they secured Byzantine recognition of their right to settle south of the Danube by defeating – possibly with the help of local South Slavic tribes – the Byzantine army led by Constantine IV. During the 9th and 10th century, Bulgaria at the height of its power spread from the Danube Bend to the Black Sea and from the Dnieper River to the Adriatic Sea and became an important power in the region competing with the Byzantine Empire.
Part of the Pliska fortress
Khan Krum defeats the Byzantine Emperor Nicephorus I in the battle of the Varbitsa Pass, Manasses Chronicle
Emperor Simeon I: The Morning Star of Slavonic Literature, painting by Alfons Mucha
Samuel's Fortress in Ohrid