Listen to Beethoven: Piano Concerto No. 1 in C Major, Op. 15: III. Rondo. Allegro online. Beethoven: Piano Concerto No. 1 in C Major, Op. 15: III. Rondo. Allegro is an Unknown language song and is sung by Krystian Zimerman, London Symphony Orchestra and Sir Simon Rattle. Beethoven: Piano Concerto No. 1 in C Major, Op. 15: III. Rondo. Allegro, from the album London Symphony Orchestra: A Classical Aesthetic, was released in the year 2022. The duration of the song is 8:54. Download Unknown songs online from JioSaavn.