Project for an altar in a side chapel, Pencil, pen, ink, brush and blue water colors on paper, Verticle composition of an altar. The backwall of the chapel is framed by the lower part of the bay of the main nave of the church with two pilasters supporting the entablature. The entrance arc is supported by two shorter columns. There is a eustachian above with a crown in front of two festoons. Groups of pilastars and columns support the entablature of the altar. A window is included in the center with the Dove of the Spirit in front of it., Rome, Italy, 1725-1750, architecture, interiors, Drawing, Drawing