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
Crucifixion Diptych (van der Weyden) other Crucifixion paintings have been attributed to van der Weyden: Crucifixion Diptych (van der Weyden) Crucifixion Diptych — also known as Philadelphia Diptych, Calvary Diptych, Christ on the Cross with the Virgin and St. John, or The Crucifixion with the Virgin and Saint John the Evangelist Mourning — is a diptych by the Early Netherlandish artist Rogier van der Weyden, completed c. 1460, today in the Philadelphia Museum of Art. The panels are noted for their technical skill, visceral impact and for possessing a physicality and directness unusual for Netherlandish art of the time. The Philadelphia Museum of Art describes