Altarpiece two, three, and multiple panels respectively. In the thirteenth century each panel was usually surmounted with a pinnacle, but during the Renaissance, single panel, or "pala", altarpieces became the norm. In both cases the supporting plinth, or "predella" often featured supplementary and related paintings. If the altar stands free in the choir, both sides of the altarpiece can be covered with painting. The screen, retable or reredos are commonly decorated. Groups of statuary can also be placed "on" an altar. A single church can furthermore house several altarpieces on side-altars in chapels. Sometimes the altarpiece is set on the altar
Annunciation (van Eyck, Madrid) Annunciation (van Eyck, Madrid) The Annunciation (sometimes Diptych of The Annunciation) is an oil on wood in grisaille painting by the Early Netherlandish artist Jan van Eyck, dated by art historians as between 1434 and 1436. The panels form a diptych, and are currently in the collection of the Museo Thyssen-Bornemisza, Madrid. The figures and iconography are very similar to those in the outer panels of van Eyck's earlier "Ghent Altarpiece" completed in 1432. However, their relative small scale suggests commission for private worship rather than public celebration. The panels show the Archangel Gabriel on the left and the Virgin