(and yea the rembrandt painting is all over the place, on jetpunk alone I ve seen it a dozen times (I thinkeven more than henry! though henry definitely has been the answer more often and the thumbnails on quizzes, not counting those)
TL;DR Marat was an pretty important figure in the France Revolution who should be recognized more. Also, the painting itself is pretty amazing.
I stumbled on the stunning Lady Godiva, though.
And by the way, what do you meant, and which one is "impossible"?