Christ, sometimes accompanied by God the Father and the Holy Spirit in the form of a dove, places a crown on the head of Mary as Queen of Heaven.
[1] The Roman Catholic Church celebrates the feast every August 22, in place of the former octave day of the Assumption of Mary in 1969, a change made by Pope Paul VI.
The act of the Virgin Mother of God being physically crowned as Queen of Heaven and Earth after her Assumption is a traditional Catholic belief echoed in the Rosary.
A sermon wrongly believed to be by Saint Jerome elaborated on these and was used by standard medieval works such as the Golden Legend and other writers.
In general, the art of this period, often paid for by royalty and the nobility, increasingly regarded the heavenly court as a mirror of earthly ones.
The subject seems to first appear in art, unusually, in England, where f. 102v in the Benedictional of St Æthelwold (963-984), for the Feast of the Assumption, shows the death and Coronation of the Virgin, possibly the first Western depiction.
In earlier versions, Mary and Christ often sit side-by-side on a wide throne, and typically are only accompanied by angels in smaller altarpieces, although these were often in polyptych form, and had saints on side-panels, now often separated.
From the High Renaissance onwards, the subject is often combined with an Assumption as a group of Apostles is on the earthly space below the heavenly scene, sometimes with Mary's empty tomb.
As the central panel of altarpieces became larger until it abandoned the predella and side-panels, the Coronation was one subject suited to a very tall composition, especially if it had Apostles or other saints of importance to the community depicted on the lower sections.
A crowned Mary is usually seen in Jesse Trees, which stress her earthly royal descent from the House of David, something accorded considerable importance in the Middle Ages.