As a composer Lehár started with contributions to the opera-genre but the great triumph of his operetta's made him clear that he had to gif his talents to the genre. Der Zarewitsch is one of those succesful operetta's. In the Wolgalied the Zarewich sings of his isolation. It all end unhappily, when he ascends the throne and is compelled to leave his beloved Sonja with whom he has eloped to Naples. In this transcription the solo part of the Zarewitsch is played by the Euphonium.