This marble bust portrays Jeanette Caroline von Alopaus, the wife of a Russian diplomat, Dawid Maximovich Alopaeus. Johann Heinrich von Dannecker (1758-1841), the author of the portrait, was a German sculptor. Apart from short trips, he spent his life Stuttgart and is considered. His works now showed the double influence of his admiration for Antonio Canova and his study of the antique. In 1803, he made a first terracotta model of Ariadne on the Panther, which he executed in marble between c.1810 and 1814. This is generally regarded as his masterpiece and one of the most important sculptures of the nineteenth century (today in the Liebieghaus Sculpture Collection, Frankfurt, and here: https://www.myminifactory.com/object/3d-print-ariadne-on-the-panther-ariadne-auf-dem-panther-73706 )