First Bulgarian Empire

The First Bulgarian Empire (Church Slavonic: ц︢рьство бл︢гарское, ts'rstvo bl'garskoe^[10]) was a medieval Bulgarian state founded in AD 632 in the lands near the Danube Delta and which disintegrated in AD 1185 after its annexation to the Byzantine Empire.

First Bulgarian Empire ц︢рьство бл︢гарское
681–991
First Bulgarian Empire in 850[1][2]
Capital	Pliska (681–893), Preslav (893–968/972)
Common languages	Bulgar,[3] Proto-Slavic, Byzantine Greek,[4][5][6] Balkan Romance, Church Slavonic[7]
Religion	Tengrism, Slavic paganism (681–864), Orthodox Christianity (state religion from 864)
Government	Absolute monarchy
Monarch
• 681-700	Asparuh (first)
• 930s-991	Roman of Bulgaria (last)
Historical era	Middle Ages
• Asparuh arrives and defeats Eastern Rome at the Battle of Ongal	680
• New Bulgarian state recognized by Eastern Rome	681
• Christianisation	864
• Adoption of Church Slavonic as a national language	893
• Simeon I assumes the title of Tsar (Emperor)	913
• Theme Bulgaria established in Byzantine Empire	1018 991
Area
895[8]	440,000 km2 (170,000 sq mi)
927[8][9]	325,000 km2 (125,000 sq mi)
1000[8]	235,000 km2 (91,000 sq mi)
Preceded by Succeeded by Quaestura exercitus Avar Khaganate Old Great Bulgaria Byzantine Empire under the Macedonian dynasty