Canonical coronation
A canonical coronation (Latin: Coronatio Canonica) is a pious institutional act of the pope, duly expressed in a formal decree of a papal bull, in which the pope bestows the pontifical right to impose an ornamental crown, a diadem or an aureole to an image of Christ, Mary or Joseph that is widely venerated in a particular diocese or locality. The act was later regulated to Marian images only, through the Sacred Congregation of Rites' instruction, De coronatione imaginum B.V. Mariae, issued on 25 March 1973.