Princess Yekaterina Mikhailovna Dolgorukaya (In Russian Княжна Екатерина Михаиловна Долгорукая) (14 November 1847 - 15 February 1922) November 14 is the 318th day of the year (319th in leap years) in the Gregorian Calendar, with 47 days remaining. ... 1847 was a common year starting on Friday (see link for calendar). ... February 15 is the 46th day of the year in the Gregorian Calendar. ... 1922 was a common year starting on Sunday (see link for calendar). ...

Catherine was the daughter of Prince Mikhail Dolgoruky and Vera Visnevskaya. She was a long-time mistress of Tsar Alexander II of Russia and later, as his morganatic wife, was created Princess Yurievskaya. Tsar (Bulgarian цар, Russian царь,   listen?; often spelled Czar or Tzar and sometimes Csar or Zar in English), was the title used for the autocratic rulers of the First and Second Bulgarian Empires since 913, in Serbia in the middle of the 14th century, and in Russia from 1547 to 1917 (although... Alexander II (1818-1881) Alexander (Aleksandr) II (Russian: Александр II Николаевич) (April 17, 1818–March 13, 1881) was the Emperor (tsar) of Russia from March 2, 1855 until his assassination. ...

Alexander and Yekaterina already had three children when they formed a morganatic marriage on July 6, 1880, less than a month after the death of the emperor's wife, Marie of Hesse and by Rhine, on June 8. A fourth child would be born to them before his death. Yekaterina became a widow with the assassination of Alexander II on 1 March 1881 by members of Narodnaya Volya. A morganatic marriage is a type of marriage which can be contracted in certain countries, usually between persons of unequal social rank (unebenbürtig in German), which prevents the passage of the husbands titles and privileges to the wife and any children born of the marriage. ... July 6 is the 187th day of the year (188th in leap years) in the Gregorian Calendar, with 178 days remaining. ... 1880 was a leap year starting on Thursday (see link for calendar). ... Marie of Hesse Princess Maximilienne Wilhelmine Marie of Hesse and the Rhine (8 August 1824-8 June 1880) was a princess of Grand Ducal Hesse and, as Marie Alexandrovna, Empress consort of Alexander II of Russia. ... June 8 is the 159th day of the year in the Gregorian Calendar (160th in leap years), with 206 days remaining. ... Alternate uses: see widow (typesetting). ... Jack Ruby murdered the assassin, Lee Harvey Oswald, in a very public manner. ... March 1 is the 60th day of the year in the Gregorian calendar (61st in leap years). ... 1881 was a common year starting on Saturday (see link for calendar). ... Narodnaya Volya (Народная воля in Russian, known as People’s Will in English) was a Russian revolutionary organization in the early 1880s. ...

Yekaterina and Alexander had four children:

• Georgi Alexandrovich Yurievsky (12 May 1872 - 13 September 1913). Married Alexandra of Oldenburg, Countess von Zarnekau, daughter of Konstantin Friedrich Peter, Duke of Oldenburg and Agrafena Djaparidze, Countess von Zarnekau.
• Olga Alexandrovna Yurievsky (7 November 1874 - 10 August 1925 Married Georg Nikolaus of Nassau, Count von Merenberg.
• Boris Alexandrovich Yurievsky (23 February - 11 April 1876).
• Yekaterina Alexandrovna Yurievskaya (9 February 1878 - 22 December 1959). She married firstly Alexander Vladimirovich, Prince Baryatinsky and secondly Sergei Platonovich, Prince Obolensky.