history of bulgaria - First Bulgarian Empire
Picture of The First Bulgarian Empire's greatest territorial extent during the reign of Tsar Simeon

During the late Roman Empire, the land of present-day Bulgaria was organised in several Roman provinces: Scythia (Scythia Minor), Moesia (Upper and Lower), Thrace, Macedonia (First and Second), Dacia (Coastal and Inner, both south of Danube), Dardania, Rhodope and Hemimont, and had a mixed population of Greeks, Thracians and Dacians, most of whom spoke either Greek or a Latin-derived language known as Romance. Several consecutive waves of Slavic migration throughout the 6th and the early 7th century led to a dramatic change of the demographics of the region and its almost complete Slavicisation.

Under the warrior Khan Krum (802-814), Bulgaria expanded northwest and south, occupying the lands between the middle Danube and Moldova rivers, all of present-day Romania, Sofia in 809 and Adrianople in 813, and threatening Constantinople itself. Krum implemented law reform intending to reduce poverty and strengthen social ties in his vastly enlarged state.

During the reign of Khan Omurtag (814-831), the northwestern boundaries with the Frankish Empire were firmly settled along the middle Danube. A magnificent palace, pagan temples, ruler's residence, fortress, citadel, water-main and bath were built in the Bulgarian capital Pliska, mainly of stone and brick.

Under Boris I, Bulgarians became Christians, and the Ecumenical Patriarch agreed to allow an autonomous Bulgarian Archbishop at Pliska. Missionaries from Constantinople, Cyril and Methodius, devised the Glagolitic alphabet, which was adopted in the Bulgarian Empire around 886. The alphabet and the Old Bulgarian language gave rise to a rich literary and cultural activity centered around the Preslav and Ohrid Literary Schools, established by order of Boris I in 886.

(Picture) Ceramic icon of St Theodore from around 900, found in Preslav

In the early 10th century, a new alphabet — the Cyrillic alphabet — was developed at the Preslav Literary School, based on the Greek and the Glagolitic cursive. An alternative theory is that the alphabet was devised at the Ohrid Literary School by Saint Climent of Ohrid, a Bulgarian scholar and disciple of Cyril and Methodius.

By the late 9th and early 10th centuries, Bulgaria extended to Epirus and Thessaly in the south, Bosnia in the west and controlled all of present-day Romania and eastern Hungary to the north. A Serbian state came into existence as a dependency of the Bulgarian Empire. Under Tsar Simeon I of Bulgaria (Simeon the Great), who was educated in Constantinople, Bulgaria became again a serious threat to the Byzantine Empire. Simeon hoped to take Constantinople and become emperor of both Bulgarians and Greeks, and fought a series of wars with the Byzantines through his long reign (893-927). The war boundary towards the end of his rule reached Peloponnese in the south. Simeon proclaimed himself "Tsar (Caesar) of the Bulgarians and the Greeks," a title which was recognised by the Pope, but not of course by the Byzantine Emperor.

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