Among his activities as the "dethroned sovereign of the eastern empire of Constantinopolis" were granting titles of nobility, claiming the position of Grand Master of the Constantinian Order of Saint George, appointing his own Patriarch as well as attempting to make the Vatican canonize Constantine XI as a saint.
[2][3] In the 1940s, Crivez began to work on his pretensions, hatching a scheme to integrate himself into Grégoire Paléologue's family.
[3] After creating his genealogy, Crivez convinced Alexandrine to adopt him, invoking a supposed ancient Byzantine protocol that in the absence of legitimate children, the emperor's widow could nominate the new imperial heir.
[3] As the supposed rightful Byzantine emperor, styling himself as the "dethroned sovereign of the eastern empire of Constantinopolis",[6] Crivez also extended imperial honors to his younger brother Alexandre (who died in 1976), naming him the "Prince of the Morea".
[6] Crivez repeatedly and unsuccessfully petitioned the Vatican to canonize Constantine XI Palaiologos as a saint.