Noun
The step, or raised secondary part, of an altar; a superaltar; hence, in Italian painting, a band or frieze of several pictures running along the front of a superaltar, or forming a border or frame at the foot of an altarpiece.
Source: Webster's dictionaryA predella of the Altarpiece remains intact in the National Gallery, London which is a superb example of Fra Angelico's ability. Source: Internet
A scene in Paolo Uccello's Corpus Domini predella (c. 1465-1468), set in a Jewish pawnbroker's home. Source: Internet
It has been suggested that the subject of the main panel, on which Duke Frederick of Montefeltro of Urbino appears in the background conversing with an Asian, is related to the antisemitic intention of the predella. Source: Internet