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Moesia(mē`shə), ancient region of SE Europe, south of the lower Danube River. Inhabited by Thracians, it was captured by the Romans in 29 B.C. It was later organized as a Roman province, comprising roughly what is now Serbia (Upper Moesia) and N Bulgaria (Lower Moesia). Under the empire Roman colonies flourished in the Danube valley.
a country in antiquity between the lower Danube and the Balkan Mountains, inhabited by various Thracian tribes, including the Moesi, Getae, and Bessi. It was bounded by the Drina River on the west and by the Black Sea on the east. In the seventh and sixth centuries B.C., Greek colonies, notably Odessos, Callatis, Tomi, and Istrus, were founded on the Black Sea coast.
Moesia was conquered by Rome in 29–27 B.C. Western, or Upper, Moesia came under Roman rule at that time, becoming a Roman province not later than A.D. 15. Eastern, or Lower, Moesia became part of Thrace, a Roman dependency, and in A.D. 46 it was annexed to the province of Moesia. In 86, Moesia was divided into two provinces, Upper and Lower Moesia. At the end of the third century, Upper Moesia (Moesia I) became part of the diocese of Moesia (with Macedonia, Epirus, Achaea, and Crete), and Lower Moesia (Moesia II) became part of the diocese of Thrace. In the fourth century Moesia I was incorporated into the diocese of Dacia. The region was settled by Goths in the fourth century and by Slavic tribes in the sixth and seventh centuries.