European Aristocrat, Author. She was known for her very public relationship with Austrian writer, Karl Kraus. Born in what was the Austria-Hungary Empire, Sidonie Amálie Vilemína Karolína Julie Marie Nádherná of Borutín was the youngest child of the great landowner Karel Boromejský Jan Ludvík Knight Nádherný of Borutín and his wife Amalie Klein of Wisenberg. "Sidi," as she was called, had four older brothers. On September 8, 1913, she met writer, Karl Kraus, at the Viennese Café Imperial. She became the love-of-his-life, and their passionate relationship was off and on over many years. She was close friend to poet, Rainer Maria Rilke, and the letters between the two have been published. Over several years, Kraus wrote large parts of his drama “The Last Days of Mankind” at her family’s home, Janowitz Castle. In 1914 it was announced that she was going to marry an Italian count, but World War I stopped the nuptials, hence she returned to Kraus. In 1918, at the end of the war, she broke with Kraus again. In 1920, she married the Austrian Aristocrat Maximilian von Thun und Hohenstein in the Heiligenkreuz Abbey, but before the end of 1920, she was back with Kraus. In 1924, they separated again. The last reconciliation was in 1927 and not as passionate, but she was with him when he died. Running with only a light bag, she was expelled from her home by the Communists in February 1948 to exile in Western Europe. To Kraus, she was not only his lover, but an important correspondence partner, "creative listener" and addressee of his books and poems. In 2005, Kraus’ “Letters to Sidonie Nádherný of Borutin from 1913 to 1936," 2 volumes was published; “Rainer Maria Rilke and Sidonie Nádherný of Borutin, correspondence from 1906 to 1926” was published in 2007; and in 2015 “Garden Beauty or the Destruction of Central Europe: Sidonie Nádherný - Letters to Václav Wagner from 1942 to 1949.” Her letters documented the historical facts from the first part of the 20th Century in Europe along with the impact of these events on her life. She died from lung cancer as an impoverished exile in England and was buried in St. Mary the Virgin Cemetery in Buckinghamshire, England. In 1999 her coffin was transferred to her family’s home at Janowitz Castle and buried on the grounds. A cenotaph marker remains at the original burial site in England. Her notritary has increased since the 2013 publication of the bestselling American novelist, Jonathan Franzen's “The Kraus Project."