anglicky: Title of the thesis: Louis Leger, mediator of the Czech-French cultural relationships. Key words: Louis Leger, Slavic studies, Collège de France, correspondence, policy, Frantisek Palacky, Frantisek Ladislav Rieger, Ernest Denis, Hanus Jelinek, Karolina Svetla, Sobeslav Pinkas, Jan Neruda. Abstract: Louis Leger, french Slavophile, Slavicist and promoter of Czech issues in France in the second half of the 19th century, led correspondence with leading figures of the French nation as well as with the personalities of the Slavic word. Leger's correspondence with the Czech national elite is evidence of his interest in the Czech issue. Correspondence written in Czech and French is stored in the Literary Archive of the Museum of Czech Literature in Prague. The aim of this thesis is to discuss the Leger's written correspondence and present its contents to readers with regard to the historical context.