This is one of the important railway routes between northern and southern Bulgaria.

There are several minor oil and gas deposits in Northern Bulgaria.

"Vlachia" as a designation for northern Bulgaria only disappeared from the sources after the middle of the 13th century.

The former predominated in northern Bulgaria and the latter in the south.

The feature is named after the town of Belene in northern Bulgaria.

The feature is named after the city of Lovech in northern Bulgaria.

The point is named after the settlement of Nikyup in northern Bulgaria.

The idea was to cut off Mackensen's army from its bases in northern Bulgaria.

Crafts prospered and trade was among the most active in Northern Bulgaria.

The island is named after the settlement of Lesidren in northern Bulgaria.