From From blog.catherinedelors.com/wp-content/uploads/18th-century-court-costume-toronto-marie-antoinette-gown.
According to Catherine Delors, this is an eighteenth century dress adapted to a cage crinoline - "This makes the comparison between these 18th century court gowns, in their pristine, unadulterated condition, with the famous “Marie-Antoinette” dress from the Royal Ontario Museum in Toronto (below) all the more striking. Here the skirt was altered to fit a round 19th century crinoline, and the plain ivory silk of the bodice does not match the exquisite embroidery work of the skirt and train. It should be noted that the Toronto gown was simply presented as “attributed to Rose Bertin” without any mention of prior ownership by Marie-Antoinette. I can only assume that such claim was not established to the satisfaction of the show’s curators."
Keywords: Marie-Antoinette, Archduchess, Queen, Habsburg family, Bourbon family, French