Thank you, the site is very interesting and there are good pictures, but the descriptions are not always complete and it seems that confusions can happen easily.
For example I found a portrait there with the headline "Kaiserin Maria Amalia". In fact, if the empress is meant, the wife of emperor Joseph I. was called "Amalia Wilhelmine", and therfore the name is not correct like that. For me it appears that it is rather their daughter, because she looks like that, but then the lady cannot be an empress. It's strange...