The emperor Alexander having opened the Crimea to German and Swiss chiliasts in search of a land of promise, the baroness's son-in-law Berckheim and his wife now went there to help establish the new colonies. In November 1820 the baroness at last went herself to St. Petersburg, where Berckheim was lying ill. She was there when the news arrived of Ypsilanti's invasion of the Danubian principalities, which opened the Greek War of Independence. She at once proclaimed the divine mission of the Tsar to take up arms on behalf of Christendom. Alexander, however, had long since exchanged her influence for that of Metternich, and he was far from anxious to be forced into even a holy war. To the baroness's overtures he replied in a long and polite letter, the gist of which was that she must leave St. Petersburg at once. In 1823 the death of Kellner, whom to the last she regarded as a saint, was a severe blow to her. Her health was failing, but she allowed herself to be persuaded by Princess Galitzine to accompany her to the Crimea, where she had established a Swiss colony. Here, at Karasubazar, she died on December 25, 1824.