Another picture from here. (And they really are very, very good. As I said in my previous posting about these, I strongly recommend rootling around.)

It's The Death of Socrates by Jacques-Louis David.

I love the certainty these old guys had that their pictures were the best pictures there were. There was no complicated excuse-making about how painters see more than photographers, photographers see only the surface, etcetera, because the photographers weren't doing it yet.