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| Anastasia Mikhailovna | |
|---|---|
| Countess de Torby Lady Anastasia Mikhailovna Wernher | |
 Portrait by Philip de László, 1913 | |
| Born | 9 September 1892 Wiesbaden, Hesse-Nassau, Kingdom of Prussia, German Empire |
| Died | 7 December 1977 (aged 85) 15 Grosvenor Square, London, England |
| Spouse | |
| Issue | George Wernher Georgina, Lady Kennard Myra, Lady Butter |
| House | Holstein-Gottorp-Romanov |
| Father | Grand Duke Michael Mikhailovich of Russia |
| Mother | Countess Sophie Nikolaievna of Merenberg |
Lady Anastasia Mikhailovna Wernher CBE (née Countess Anastasia Mikhailovna de Torby; 9 September 1892 – 7 December 1977), also known as Lady Zia Wernher, was a German-born Russian-British aristocrat and thoroughbred racehorse owner.
She was the elder daughter of Grand Duke Michael Mikhailovich of Russia by his morganatic wife, Countess Sophie Nikolaievna of Merenberg. She was the owner of Charlottown, winner of the 1966 Epsom Derby.