Altarpiece
An altarpiece is a piece of art such as a painting, sculpture or relief representing a religious subject and suspended in a frame behind the altar of a Christian church. Altarpieces were one of the most important products of Christian art especially from the late Middle Ages to the era of the Counter-Reformation.
History
Origins and early development
Altarpieces seem to have begun to be used during the 11th century, with the possible exception of a few earlier examples. The reasons and forces that led to the development of altarpieces are not generally agreed upon. The habit of placing decorated reliquaries of saints on or behind the altar, as well as the tradition of decorating the front of the altar with sculptures or textiles, preceded the first altarpieces.
Many early altarpieces were relatively simple compositions in the form of a rectangular panel decorated with series of saints in rows, with a central more pronounced figure such as a depiction of Mary or Christ. An elaborate example of such an early altarpiece is the Pala d'Oro in Venice. The appearance and development of these first altarpieces marked an important turning point both in the history of Christian art and Christian religious practice. As pointed out in the Grove Encyclopedia of Medieval Art and Architecture, "The advent of the altarpiece marks a significant development not only in the history of the altar, but also in the nature and function of the Christian image. The autonomous image now assumed a legitimate position at the centre of Christian worship."