Two Alternate Designs for an Altar (?)

Anonymous, Italian, Piedmontese, 18th century · 1700–1780 · Pen and brown ink, brush with gray and red-chalk wash, over graphite or leadpoint, with ruled and compass construction; framing lines in pen and brown ink; scale, at bottom, in pen and brown ink

From the collection of The Metropolitan Museum of Art. Free to download, adapt and use — no permission needed.