The Grand Master of the Constantinian Order is His Royal Highness Prince Don Pedro of Bourbon Two Sicilies, Duke of Calabria.

His Royal Highness holds several dignities.

He is Grand Master of the Constantinian Order by right of male primogeniture, as the senior male line descendant of King Ferdinand I of the Two Sicilies, Grand Master of the Constantinian Order.

Separately, he is Head of the formerly reigning Royal House of the Two Sicilies, according to the succession laws of that dynasty.  He is therefore the grand master of that dynasty’s chivalric order, the Order of St. Januarius (San Gennaro).

He is also a member of the Family of the King of Spain.  He faithfully carries out all duties assigned to him by King Felipe VI, his second cousin, including the duties of President of the Council of the four Spanish military orders (the Orders of Santiago, Calatrava, Alcántara and Montesa). 

(The Constantinian Order and the Order of St. Januarius are treated in the same way as the Orders of Malta and the Holy Sepulchre in the Spanish honors system.)