„Christianisation” is a term frequently employed in academic discourse on Antiquity. And yet, in contrast to both Hellenisation and Romanisation, the actual mechanisms of this process as such, originating in the Imperial Roman and Late Antique periods, but so fundamental for the later history of both Europe and beyond, have hardly ever been addressed. Our research project wishes to contribute to a closing of this gap and, therefore, aims at a study scrutinising a theoretical reflection of the subject. For this purpose, research on this process will draw on a broad empirical basis. It must be assumed that Christianisation will have progressed both at different speeds and with differing intensities in the various regions and areas (imperial self-presentation, usage of Christian symbols in art etc.). We have, therefore, deliberately employed the term „Christianisations” in the title of the project. Consequently, the methodical aim focuses on the tracing of differences and asynchronies. As a first vantage point for the selection and classification of the objects of research a phase model has emerged, distinguishing between specific Christianisations, neutralisation and totalisation. In front of this background a number of studies both of a more specific nature, as well as synthetic works are planned, aimed at contributing to develop a new picture of this process. The project has been supported by the DFG (Deutsche Forschungsgemeinschaft, German Research Foundation) since October 2011, with funding approved for five years.