PANENUS, a distinguished Greek painter, was the nephew of the great sculptor Phidias, and flourished at Athens in the fifth century B.C. His principal engagements were of a public nature. He ornamented with painted stories of the gods the Olympian statue of Jupiter which his illustrious uncle had executed. He was also employed to paint with a mixture of saffron and milk the roof of Minerva's temple at Elis. But his masterpiece was the "Battle of Marathon," which constituted one of the decorations of the "Pocile" at Athens. It contained portraits of the Greek leaders Miltiades, Callimachus, and Cynægirus; and of the Persian leaders Datis and Artaphernes. A further peculiarity was, that it represented the fight in four different stages of its progress. In the first the armies were about to engage; in the second they were maintaining an equal contest; in the third the Greeks were beginning to rout their foes; and in the fourth the Persians were escaping in disorder on board their ships.