He also claims the title of Duke of Ostuni (in the Two Sicilies).
The Marquess is author of many books on jurisprudence, history, royalty, nobility, heraldry and genealogy.
He is a retired Lieutenant-Commander (OF-3) of the Spanish Navy and holds the rank of Captain in the Merchant Marine Fleet.
He has also been awarded a doctorate in Law, a doctorate in Political Science and a doctorate in History as well as receiving many orders of knighthood.