This comes from the Moscow Kremlin Museums - Музеи Московского Кремля.
From fripperiesandfobs.tumblr.com-post-171291181070-coronation-dress-of-empress-elizabeth-alexeievna; print removed from images with Photoshop.
Elizabeth Alexeievna’s coronation dress pays no heed to the prevailing revolutionary styles. The profuse lace sleeve ruffles is noteworthy. So are the modesty piece and bertha.
Keywords: 1801, Elizabeth Alexeievna, Luise Marie Auguste, Prinzessin von Baden, Елизавета Алексеевна, Princess, Tsaritsa, Baden family, Romanov family, Russian, lace-edged modesty piece, shallow U-neckline, under-dress, fitted bodice, lace bertha, scoop neckline, over-dress, long sleeves, lace ruffles, waist sash, close over-skirt, train, coronation dress