1902 Friedrich I und Luise von Baden by Hanns Fechner (location unknown to gogm)
From Wikimedia; the image had extensive foxing (brownish spots) that were removed with Photoshop by gogm.
Luise is probably wearing the same dress as seen in the last image.
Keywords: 1902, Fechner, Luise of Prussia, Princess, Grand Duchess, Hohenzollern family, Baden family, German, lace cap, blouse, high enclosing neckline, jabot, lace, jacket, lapels, epaulettes, close sleeves, pin