Barbara_von_Krüdener--Czar_of_Russia_Alexander_I

Beate Barbara Juliane Freifrau von Krüdener (née Freiin von Vietinghoff genannt Scheel; 22 November [O.S. 11] 1764 – 25 December [O.S. 13] 1824), often called by her formal French name, Madame de Krüdener, was a Baltic German religious mystic, author, and Pietist Lutheran theologian who exerted influence on wider European Protestantism, including the Swiss Reformed Church and the Moravian Church, and whose ideas influenced Tsar Alexander I of Russia.