This thesis investigates the European geographical imagination of language in Central Asia from the late 18th century to the First World War. While this “terra incognita” between Russia and India, China and Persia was shaped according to the interests of empires, it was also conceived by European scholars as the probable cradle of the Indo- European languages and civilisations. Using published as well as unpublished documents from German, French, Russian, Hungarian, Swedish and British archives and libraries, I sketch the lives, ideas, practices and networks of several key figures who contributed to this narrative of Central Asia as a mythical European “homeland”. The thesis opens by discussing the epistemological importance of linguistic ...