She has been eclipsed by her sister Ekaterina who was mistress and then morganatic wife to Tsar Alexander II. Maria’s Russian-language Wikipedia article is here. She married twice. The second marriage to Count George Gustavovich Berg was happy and they had two sons. Her first husband, Prince Emmanuel N. Meshcherskiy, was killed by gun fire in the 1877 Russo-Turkish War.
From Wikimedia.
This portrait shows bustle dresses evolving from crinolines. Her dress has a crinoline-era neckline, bertha, and sleeves - and a rather full skirt.
Keywords: 1871, Gordigiani, Maria Mikhailovna Dolgorukova, Dolgorukov family, Berg family, Princess, Countess, Russian, long straight coiffure, braided bun, floral headdress, necklace, earrings, chemise, modesty piece, quarter length tight under-sleeves, fitted bodice, lace bertha, quarter length close over-sleeves, lace cuffs, bustle, full skirt, over-skirt