The article is dedicated to “Theatre de la Revolution” of R. Rolland – a cycle of plays about the French revolution of 1789, which is viewed in the aspect of the problem of the synthesis of the arts (in this case – the literary and musical arts). As a result of the analysis of «Theatre de la Revolution» poetics compared to the symphonic quality of Beethoven (who Rolland was guided by), the naturalness and the reasonableness of Rolland’s including the musical symphonic element in his dramaturgic cycle is proved.