Here's what good family connections and royal bloodlines can get you. On the day of her wedding, Beatrice Borromeo became the owner of five private islands which all carry her family name. They formed an unusual dowry-of-sorts as part of her 2015 wedding to Pierre Casiraghi, as a way of welcoming him into the family.
This may sound completely insane until you take into account the royal connection - this kind of thing goes on all the time in royal families! Casiraghi is the son of Princess Caroline of Hannover. Borromeo is also from aristocracy, and the done thing at such a high-profile social wedding is to tie assets together. The islands had been in the Borromeo family since the seventeenth century, and one served as the setting for the wedding. We've seen a lot of islands on this list, but this is the only set with a fortified chapel!