Within social and economic history, research on medieval society has long enjoyed the attention of medievalist scholarship. The choice of topics and the quality of their treatment has often been dependant on the development of historical sciences and individual theoretical concepts. The emphasis has typically been centred on describing the internal organisation, social stratification and social transformations, which are closely linked to the formation of new social classes in royal, ecclesiastical or secular estates. Power, political and above all, economic factors were often taken into account, which had a significant impact on social transformations. In researching higher and lower social classes, historians have addressed a wide range of topics, including the question of freedom and unfreedom, the formation of the nobility, privileged communities and the burghers, slavery and its demise, the social status of economic dependents, as well as the relations of landlords with their subjects. The above-mentioned statements are also valid for research into the formation and internal organisation of medieval Hungarian society, which was also undergoing professed transformations in the 11th to the 13th centuries.