"Princess Catherine Dolgorukova (Russian: Екатери́на Миха́йловна Долгору́кова, romanized: Yekaterína Mikháyilovna Dolgorúkova; 14 November [O.S. 2 November] 1847 – 15 February 1922) was a Russian aristocrat and the daughter of Prince Michael Dolgorukov and Vera Vishnevskaya.
Catherine was a long-time mistress of Tsar Alexander II and later, as his morganatic wife, was given the title of Princess Yurievskaya (Russian: Светлейшая княгиня Юрьевская).
Alexander and Catherine already had three children when they formed a morganatic marriage on 18 July [O.S. 6 July] 1880, after the death of the Emperor's wife, Marie of Hesse and by Rhine, on 3 June [O.S. 22 May] 1880. A fourth child had died in infancy. Catherine became a widow with the assassination of Alexander II on 13 March [O.S. 1 March] 1881 by members of Narodnaya Volya." - (en.wikipedia.org 01.02.2024)
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