Northern Bulgaria

Northern Bulgaria (Bulgarian: Северна България, romanized: Severna Bylgarija), also called Moesia (Bulgarian: Мизия, Mizija) is the northern half of Bulgaria, located to the north of the main ridge of the Balkan Mountains which conventionally separates the country into a northern and a southern part.

Besides the Balkan Mountains, Northern Bulgaria borders the Timok River and Serbia to the west, the Danube River and Romania to the north, and the Bulgarian Black Sea Coast to the east.

Geographically, the region's terrain is relatively uniform, dominated by the hilly Danubian Plain, with some low plateaus to the east.

The lower northern reaches of the Balkan Mountains are called the Fore-Balkan, as opposed to the Sub-Balkan valleys to the south of the main ridge.

In Antiquity, the Jireček Line divided Latin (in the north) and Ancient Greek (in the south) language influence in the Balkans, with Northern Bulgaria to the north of it and Southern Bulgaria to the south.