Konopiste

Archduke Franz Ferdinand had a morganatic marriage to Sophie due to her lower standing. Ferdinand was in line to become the next emperor so since Sophie was of lower standing he had to compromise that she couldn't gain title after marriage and their children could never inherit the thrown. Ferdinand inherited money and title, D'Este, from his uncle when he was twelve, which he used later in life to buy Konopiste after his marriage to Sophie. The Archduke loved to hunt and decorated his house with his trophies. His total games killed was about 276,000, 4000 of which were in display in his house. I would say had a obsession with hunting that Ferdinand which might have been an outlet for him dealing with his other health problems. I believe incest in royal family over the years had made the newer members more and more eccentric.