Ordo Coronandi Imaginem Beatae Mariae Virginis
The Ordo Coronandi Imaginem Beatae Mariae Virginis is a Pontifical book of instruction used within the Roman Catholic Church. The ecclesiastical work gives the official instruction of how a venerated statue of the Virgin Mary should be crowned. The 1981 edition was approved by Pope Paul VI through the Congregation for Divine Worship and the Discipline of the Sacraments which authorizes exemplary Marian images that are approved for a Canonical Coronation. The work is also considered as an important instruction and teaching in Mariology, Marian cult and devotion. These instructions only can be performed  by a Catholic bishop in name of the reigning Pope, even if the Papal bull of coronation was signed by a previously reigning Pontiff. The instruction prescribes the materials that can be used for the crowns, often in high quality and appropriate sacred regalia.