Project for an altar, Pencil, brush, pen, sepia and grey water color on paper, Vertical composition of an altar with three steps. The mensa and the inner sections of the dado and the base of the retable are curved. On top of the frame of the picture is a crown, serving like a pin for the laurel branches springing from the upper part of the frame. At the bottom the plan is visible. There is an aedicula scheme with embedded columns supporting the entabulature and triangular pediment., Rome, Italy, 1700-1750, architecture, interiors, Drawing, Drawing