It is interesting to note the different function of the scenes represented on the two sides of the Maestà. The front side was a devotional image destined for the community of the faithful (which explains its size, clearly visible from every corner of the church), while the back was essentially a narrative cycle intended for the closer observation of the clergy in the sanctuarythe part of a church or temple containing the shrine; in Christian churches the choir and high altar.. The main element of the back consisted of fourteen panels, originally separated by little columns or pilasters (of about 4 cm) which were lost, together with the outside frame, in the dismembering of 1771.
Except for the Entry into Jerusalem and the CrucifixionAn important method of capital punishment, particularly among the Persians, Seleucids, Jews, Carthaginians, and Romans from about the 6th century BC to the 4th century AD. Constantine the Great, the first Christian emperor, abolished it in the Roman Empire in AD 337, out of veneration for Jesus Christ, the most famous victim of crucifixion. There were various methods of performing the execution. Usually, the condemned man, after being whipped, or "scourged," dragged the crossbeam of his cross to the place of punishment, where the upright shaft was already fixed in the ground. Stripped of his clothing either then or earlier at his scourging, he was bound fast with outstretched arms to the crossbeam or nailed firmly to it through the wrists. The crossbeam was then raised high against the upright shaft and made fast to it about 9 to 12 feet (approximately 3 metres) from the ground. Next, the feet were tightly bound or nailed to the upright shaft. A ledge inserted about halfway up the upright shaft gave some support to the body; evidence for a similar ledge for the feet is rare and late. Over the criminal's head was placed a notice stating his name and his crime. Death, apparently caused by exhaustion or by heart failure, could be hastened by shattering the legs (crurifragium) with an iron club, so that shock and asphyxiation soon ended his life., each panelTerm in painting for a support of wood, metal, or other rigid substance, as distinct from canvas. Until the adoption of canvas in the 15th century nearly all the movable paintings of Europe were executed on wood, and even up to the beginning of the 17th century it is probable that as much painting was done on the one support as on the other. Painters who worked on a small scale often used copper panels (Elsheimer is a leading example), and in the colonial art of South America copper and tin and even lead and zinc were used. On a larger scale, slate has occasionally been used as a support, notably by Rubens for his altarpiece for Sta Maria in Vallicella (the Chiesa Nuova) in Rome; the picture he originally painted was said to reflect the light unpleasantly and slate was used for the replacement to produce a more matt finish. For wood panels the Italian masters of the Renaissance preferred white poplar, while oak was the most common wood used in northern Europe. Many other types were used, however; analysis of the contents of art galleries has yielded a long list, including beech, cedar, chestnut, fir, larch, linden, mahogany, olive, and walnut. In the 20th century cedar, teak, and dark walnut are favourites, and modern painters have also used plywood, fibre-board, and other synthetic materials as supports. contains two episodes. The central part of the lower row with the Agony in the Garden and Christ taken Prisoner is twice as wide as the other compartments (but the same as the Crucifixion panel) because the events portrayed are composed of different narrative units.
Numerous contrasting theories have been advanced by critics for the order of interpretation, rendered problematical by the variety of New Testament sources drawn on by Duccio. It is certain that the cycle began at the bottom left and ended at the top right, proceeding from left to right first on the lower row and then on the upper.