Thank you all for your detailled informantion. It really seems that Vincenz wasn't always happy and often lived a alone on his castle: The text-link posted by Eric says a lot (even when I do not know, how much newspapers also might phantasize). It also seems that he was not heathly as Maximiliano says, does anyone know why he was that often in hospital? It's also strange that his wife was not in the death notice, as it was said here. Maybe there were greater conflicts for the couple. We don't know. A pity.
However I wish a happy and good future for his two daughters, it will surely be hard for them.