Photo - shakko.
From Wikimedia.
This dress worn by Elizabeth is flattened in 1700s style, but does not have room for rectangular panniers. The front of the dress and stomacher form a façade. Based on this dress and the dress seen in the previous image, she appears to have had a taste for lace sleeves.
Keywords: shakko, Tsaritsa Elizabeth, Romanov family, Tsaritsa, Russian, scoop neckline, modesty piece-bertha, lace, elbow length sleeves, engageantes, stomacher, vee waistline, panniers, full skirt