Marie Sophie Gräfin von Brühl (Countess Marie Sophie von Brühl); (3 June 1779 – 28 January 1836) was a member of the noble German Brühl family originating in Thuringia. In addition to her career as a patron of the arts in Berlin, she is known for editing and publishing the work of her husband Carl von Clausewitz, especially his military treatise On War. Early life and career Brühl was born in Warsaw, a daughter of Count by his marriage to Sophie Gomm, an aunt of the British Field Marshal Sir William Maynard Gomm. Her parents had named her Maria Sophia, but she was called Marie by her family. She was the oldest child, but many of her siblings died as infants. Therefore, Marie was protective of her sister Fanny, who had survived the smallpox epidemic. When Fanny died in March 1804 due to complications during childbirth, Marie was left to care for the orphaned daughter. Brühl also treated her younger brother Fitz more like a son than her sibling. Her education began at home under her father's guidance. He taught Marie how to write and read in French, and how to compose letters in a manner appropriate for a "lady of high society." Her mother taught her English, which Marie spoke fluently and later taught to her friends' children. Marie and Fanny also took lessons in painting, music, and history. It was their mother's intention to create "true phenomena" out of her daughters. She was a talented painter and patron of the arts. She was a close friend of the novelist Bettina von Arnim and her husband Ludwig Achim von Arnim, and of . At the age of 18, Brühl became a lady-in-waiting to queen dowager Frederika Louisa of Hesse-Darmstadt. This position was terminated in February 1805 by the queen dowager's death. Later, she became the chief lady-in-waiting to Princess Charlotte, who was only eleven years old at the time. After the death of her husband, Brühl assumed the role of chief lady-in-waiting to Princess Augusta in Berlin. One of her duties was to look after and educate Prince Frederick, who would later be known as Emperor Frederick III. In 1813, in the closing stages of the Napoleonic Wars, Brühl was a volunteer nurse in a military hospital. Years with Carl von Clausewitz Brühl met Carl von Clausewitz in December 1803 through their mutual friends, Princess Louise and her husband