The riddle of Beethoven's Immortal Beloved has haunted musicologists, biographers and admirers for a long time. Who was the adressee of the composer's passionate letter that begins with the words "my angel, my all, my very self"? It took a painstaking investigation by Maynard Solomon to answer the question. After reading his work on Beethoven (New York 1977/1998) I am convinced that the Immortal Beloved was Antonie Brentano. She was 32 and a married mother of four children when Beethoven fell in love with her. So, like all of Beethoven's affairs, it was a hopeless love. Antonie ("Toni") Brentano was the sister-in-law of Bettina ("Goethe's infant correspondent") and Clemens Brentano, the romantic poet. The famous German jurist, Friedrich Carl von Savigny, and the poet Achim von Arnim were brothers-in-law of Beethoven's love of his life. The German Geistesleben was closely connected.