The contribution deals with the period of time when Karl of Schwarzenberg was the Austrian Ambassador to Paris, that is the period of his Paris mission before the commencement of the campaign in Russia. It presents Schwarzenberg's personality as seen in his hitherto unstudied correspondence between him and Klemens von Metternich, plus some other sources of a personal nature, belonging to the same period and the same social ambience. The fundamental source was the 29 letters Schwarzenberg sent to Metternich from Paris. These map not only the social life in Paris, the world of diplomatic dealings, but also the private affairs of both figures.