Novae was initially one of the few great Roman legionary fortresses along the empire's border, forming part of the defences along the Danube in northern Bulgaria. The settlement later expanded into a town in the Roman province of Moesia Inferior, later Moesia Secunda.

Moesia was an ancient region and later Roman province situated in the Balkans south of the Danube River. Moesian Province was first administered by governor of Noricum as 'Civitates of Moesia and Triballia'. It included most of the territory of modern eastern Serbia, Kosovo, north-eastern Albania, northern parts of North Macedonia, Northern Bulgaria, Romanian Dobruja and small parts of Southern Ukraine.