[8][9] In 14th and 15th century Romanian (Wallachian) rulers built churches in North Easterb Serbia:[10] Lapuṣna, Coroglaṣ, Krepičevac, Vratna, Bucovo, Manastirica and Lozuca.

Turkish tax records (defters) from 15th century list Vlachs in the region of Braničevo in North EasternSerbia, near the ancient Roman municipium and colonia of Viminacium.

[11][page needed] Starting in the early 18th century NE Serbia was settled by Romanians (then known by their international exonym as Vlachs) from Banat, parts of Transylvania, and Oltenia (Lesser Walachia).

From the 15th through the 18th centuries large numbers of Serbs also migrated across the Danube, but in the opposite direction, to both Banat and Ţara Româneasca.

The relative isolation of the Vlachs has permitted the survival of various pre-Christian religious rites that are frowned upon by the Eastern Orthodox Church.

Settlements in the Serbian Banat (Vojvodina) with a Romanian majority or plurality (2002 census data): It is likely that a part of the Timok Vlachs can trace their ancient roots to this region.

In addition, a Vlach population in the regions around Braničevo (near the ancient Roman city of Viminacium) is attested first in 1189, as a group of local soldiers who attacked Fridrih I Barbarossa during the Third Crusade[19] and later in 15th-century Ottoman defters (tax records).

The modern Vlachs occupy the same area where in antiquity the Romans had a strong presence for many centuries: Viminacium, Horreum Margi, Lederata, Margum, Diana Fort, Timacum Minum, Cracu lui Iordan, Tabula Traiana and Felix Romuliana (Gamzigrad).

However, some of the Vlachs of north-eastern parts of Central Serbia settled there from regions north of the Danube by the Habsburgs at the beginning of the 18th century.

The area roughly defined by the Morava, the Danube and the Timok rivers where most of the Vlachs live became part of modern Serbia.

In 1835 feudalism was fully abolished in the Principality of Serbia and smaller groups from Wallachia came there to enjoy the status of free peasants.