What Western academic literature described as ethnic or cultural Tibet in fact implies something composite and processually constructed: Tibet then often appears as a typical example for explanations of collective identity (and ethnicity). Such approaches increasingly are applied in present-day anthropology and historical studies, highlighting the historical conditions and the politically, socially and ideationally constructed features of identity. In Tibet, identity-building was strongly related to the spread of Buddhism. The new religion was introduced in the time of the Tibetan Empire (seventh to ninth century), but it was only its later spread (from the eleventh century) that led to the effective, all-embracing establishment of Buddhism in the Highlands. It was interlinked with regionally different forms of political manifestations-the founding of Buddhist kingdoms at the periphery and the emergence of monastic hegemonies in the central regions. These developments correlated with processes of conversion, which in its narrative model is described as an act of conquest, taming and civilizing the physical universe and which in theory actually never ends. Apart from considering current anthropological discussions of the phenomenon of religious conversion, this paper will include a comparative view of the history of Christianization in early medieval Europe (especially in Western Europe-the Frankish kingdom and the barbarian zones North of the Rhine and the Danube, fifth to tenth century).