From antique-royals.tumblr.com; removed spots and smudges with Photoshop and removed moncolor tint. The aspect ratio (height divided by width) of the right image is slightly different from the original image.
These are additional photos of Dagmar wearing the dress seen in the last image.
Keywords: Maria Feodorovna (1847-1928), Marie Sophie Frederikke Dagmar, Prinsesse Dagmar, Princess, Tsaritsa, Glucksberg family, Romanov family, Danish, long straight coiffure, earrings, neck band, blouson chemisette, collar, zouave jacket, quarter length upper sleeves, ruching, three quarter length pagoda lower sleeves, cuffs, natural waistline, crinoline