In the medieval Serbian states, the privileged class consisted of nobility and clergy, distinguished from commoners, part of the feudal society. The Serbian nobility (srpska vlastela, srpsko vlastelinstvo or srpsko plemstvo) were roughly grouped into magnates (velikaši or velmože), the upper stratum, and the lesser nobility (vlasteličići). Serbia followed the government model established by the Byzantine Empire.
The nobility possessed hereditary allodial estates, which were worked by dependent sebri, the equivalent of Byzantine paroikoi; peasants owing labour services, formally bound by decree. The nobility was obliged to serve the monarch in war.