Moesia excluded Northern Bulgaria.
The Moesi ( [ ˈmiːsaɪ ] or [ ˈmiːzaɪ ] Μοισοί ) was a Thracian tribe which inhabited present day Northern Bulgaria and Serbia , which gave its name to the Roman province of Moesia after its defeat in 29 BC . Moesia . It included most of the territory of modern-day Central Serbia and the northern parts of the modern Republic of Macedonia ( Moesia Superior ) , as well Northern Bulgaria and Romanian Dobrudja ( Moesia Inferior ) . Northern Bulgaria ( Северна България , Severna Balgariya ) , also called Moesia ( Мизия , Miziya ) is the northern half of the territory 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 . Northern Bulgaria covers the historical region of Moesia , which in turn includes several sub-regions such as Dobruja ( sometimes not considered part of Moesia ) , Ludogorie , Gerlovo and Zlatiya .