Design for an Altar: Elevation, with Trompe l'Oeil Plan Below

Centrally placed elevation of an altar showing a painting of a penitent saint in the wilderness. The heads of two cherubs can be seen above in a circular frame. The altarpiece is flanked by Corinthian topped pilasters. A group of three figures, one of which holds a lance, appears at the left of the altar. At right, one figure carries candlesticks. Below the elevation, a sheet of paper containing a plan view is drawn in trompe-l'oeil and edged with red. The edges appear rolled, and an elaborate frame is shown at right, behind the sheet.