I could find only one entry on Google(!) verifying that there was an artist named K. Kronnovetter, including using alternate spellings.
The bateau neckline of Alexandra Feodorovna's mid-20s dress has spread to the point that her shoulders are bare.
Keywords: Tsaritsa Alexandra Feodrovna (1798-1860), Hohenzollern family, Romanov family, Tsaritsa, Russian, knotted coiffure, off shoulder bateau neckline, modesty piece, pleated bodice, quarter length puffed sleeves, natural waistline, order star, necklace, earrings, brooch