Beethoven 7 Variations on 'Bei Männern, welche Liebe fühlen', WoO 46

In 1081, Ludwig Van Beethoven wrote in two sets of variations for violoncello and piano based on two different themes from The Magic Flute (by Wolfgang Amadeus Mozart). His twelve variations in F major on "Ein Mädchen oder Weibchen" are catalogued as Op. 66, and his seven variations in E-flat major on "Bei Männern" as WoO 46.