April, 13rd 2018. HRH Prince Charles of Bourbon Two Sicilies, Duke of Castro, Grand Master and Head of the Royal House of Bourbon Two Sicilies, designed H.E. Ambassador Pietro Sebastiani as Knight of Grand Cross of Merit for his effort in the Constantinian Order and his charity activities at Circolo degli Scacchi.
The Grand Charges of the Order attended the event: His Eminence Cardinal Renato Raffaele Martino, Grand Prior, HRH Grand Prefect, H.E. Grand Chancellor, HRH Princess Camilla of Bourbon Two Sicilies, Duchess of Castro and TRH Princesses Maria Carolina, Duchess of Calabria and Maria Chiara, Duchess of Noto and Capri and several authorities, Delegates and Vice Delegates of the Order.