Listen to Symphony No. 26 in C Major, Op. 79 "Symphony On Russian Themes": III. Adagio. Allegro Maestoso online. Symphony No. 26 in C Major, Op. 79 "Symphony On Russian Themes": III. Adagio. Allegro Maestoso is an English language song and is sung by Leonid Nikolayev. Symphony No. 26 in C Major, Op. 79 "Symphony On Russian Themes": III. Adagio. Allegro Maestoso, from the album 101 Essential Classical Pieces by the Moscow RTV Symphony Orchestra, was released in the year 2012. The duration of the song is 15:08. Download English songs online from JioSaavn.