A canonical coronation (Latin: coronatio canonica) is a pious institutional act of the Pope, duly expressed in a Papal Bull, in which he bestows an ornamental crown, diadem or halo to a Marian, Christological, or Josephian image or statue that is widely venerated in a particular diocese or locality.
The formal act is generally carried out by a representing proxy of the Pope, a Papal legate, or on rare occasions by the Pontiff himself, by ceremonially attaching a crown, tiara, or stellar halo to the devotional image or statue.
Originally, the Holy Office issued the authorisation of a canonical coronation through a dicastery, called the "Vatican Chapter". Subsequently until 1989, the Vatican's Sacred Congregation of Rites was assigned this duty. Since then, the Congregation for Divine Worship and the Discipline of the Sacraments arranges to execute the ceremonial act which the decree authorizes.
The formal act of coronation towards Marian images began with the Order of Friars Minor Capuchins, who on their evangelising missions collected great quantities of jewellery associated with the practice of indulgences, which funded at the request of the faithful, the gold crowns or accessories for images of the Virgin Mary, mainly in Italy. A particular Capuchin friar, Jeronimo Paolucci di Calboldi di Forli (1552-1620), was a major advocate for this practice, and was known during his life as a self-proclaimed "Apostle of the Blessed Lady." After a simple homily, Forli crowned the Nursing Madonna, now enshrined in the Sanctuary of Santa Maria della Steccata in the Italian city of Parma on 27 May 1601.
Later, on 3 July 1636, the Marquis of Piacenza and Count of Borgonovo, Alessandro Sforza Cesarini died, having bequeathed in his will a large sum of money to the Vatican Chapter, for investment in the production of crowns of precious metals for the coronation of the most celebrated Marian images in the world. Funds from his bequest went towards the restoration of ''Madonna della Febbre'' now enshrined in the sacristy of Saint Peter's Basilica in Rome.
The enactment of the rite of the coronation of a venerated image became widely popular in the Papal states prior to 1800, when approximately 300 coronation rites were performed. On 29 March 1897, an official rite was included in the Roman Pontifical, for which a plenary indulgence was also conceded to the faithful who participated in such rites.
The solemn rite of crowning images is contained in the "Ordo Coronandi Imaginem Beatae Mariae Virginis", published by the Holy Office on 25 May 1981. Prior to 1989, papal bulls authorising canonical coronations were inscribed manually on parchment. After 1989, the Congregation for Divine Worship and the Discipline of the Sacraments began issuing the authorisations, thereby authorising a Papal legate to perform the coronation of the approved devotional image on behalf of the Pope.