Listen to Beethoven: 12 Variations on "See The Conquering Hero Comes" for Cello and Piano, WoO 45 - Thema. Allegretto online. Beethoven: 12 Variations on "See The Conquering Hero Comes" for Cello and Piano, WoO 45 - Thema. Allegretto is an Unknown language song and is sung by Mischa Maisky and Martha Argerich. Beethoven: 12 Variations on "See The Conquering Hero Comes" for Cello and Piano, WoO 45 - Thema. Allegretto, from the album Beethoven for the Home, was released in the year 2021. The duration of the song is 0:43. Download Unknown songs online from JioSaavn.