Abstract : Aesthetics represent a major theme in K.W.F. Solger's (1780-1819) philosophical as well as philological intellectual development. Our work, based on his manuscripts and on the posthumous editions, will enlighten its genesis and reception between 1800 and 1830. After presenting the sources, we describe how these are connected to one another and which concepts they let prevail (notably symbol, tragedy and irony). His intellectual biography is then being drawn from a historical inquiry stressing out his role in the University of Berlin between 1811 and 1819. A comparison between the different types of texts available today will finally point out the literary stakes of a work that has been kept unfinished by its author and has been widely revised by its posthumous editors. This research is mainly based on correspondence and aims at pointing out Solger's relationships to his contemporaries in the Romantic and Idealistic Berlin.