Princess Catherine Dolgorukova (Russian: ???????´?? ????´?????? ???????´????, tr.
YekaterĂna Mikháyilovna DolgorĂşkova; 14 November 1847 – 15 February 1922), also known as Catherine Dolgorukova, Dolgoruki, or Dolgorukaya, was the daughter of Prince Michael Dolgorukov and Vera Vishnevskaya.
She was a long-time mistress of Emperor Alexander II of Russia (r.
1855–1881) and later, as his morganatic wife, was given the title of Princess Yurievskaya (?????????? ??????? ?????????).
Alexander and Catherine already had three surviving children when they contracted 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.