Introduction. Mobility, and less so immobility, has been always in the focus of socio-cultural analysis of Mongolian societies given their nomadic way of live and the interconnectedness of its various communities scattered all over Eurasia particular in the apogee of the Mongol Empire during the thirteenth and fourteenth centuries. Yet, what are the concrete manifestations and the limits of mobility, how can we measure them? Goal. This article will briefly readdress some well and perhaps lesser known topics of the medieval Mongolian world generally related to mobility in a wider sense before fuller attention is given to the epistemological arenas of culture transfer and long-distance trade. In the first part the dialectics of mobility is discussed as socio-cultural mobility, e.g. carrier making, loyalty, integration by difference, models of inclusive ethnicity and exclusive descent (the ‘Chinggisid Principle’), invention of genealogies, marriage alliances, and religious tolerance (until Islamisation). The second part deals with spatial mobility particularly in terms of tribute relations and military service, culture transfer and travelling ideas, movement control and population transfer, the flow of goods and peoples.