Anton Schindler
In 1823, Beethoven confessed to his then-secretary and later biographer Anton Schindler, that he was indeed in love with her at the time. In his 1840 Beethoven biography, Schindler claimed that "Giulietta" was the addressee of the letter to the "Immortal Beloved". This notion was instantly questioned (though not in public) by her cousin Therese Brunsvik: "Three letters by Beethoven, allegedly to Giulietta. Could they be a hoax?" Therese's doubts were well-founded because, unlike Schindler and other contemporaries, she knew all about the intense and long-lasting romance between Beethoven and her sister Josephine: "Three letters by Beethoven ... they must be to Josephine whom he had loved passionately."