Two Scans from Piranesi
Since I've mentioned Piranesi's Dark Prisons series of etchings a few times, I figure it makes sense to put in a couple of scans of them. These are two I haven't seen as often online, "The Staircase with Trophies" above, and "Prisoners on a Projecting Platform" below. (Actually Piranesi didn't name them, but those are the typical titles for them--they're numbers 8 and 10 in the revised sequence.)