National Geographic : 1946 Mar
Mountain Tribes of Iran and Iraq 387 StaTf I'flotograiller Maynard Owen W\llianms Mail-clad King Chosroes II and His Mount Show the Persian Origin of Knighthood From Iranian warriors Byzantines borrowed the idea of armored horsemen and gave it to western Europe. Here the helmeted Iranian king, carrying a lance, rides his favorite, "Black as Night." Chosroes, conqueror of Jerusalem and Egypt, was one of the last of the Sassanian dynasts, who were overthrown by the Arabs A. D. 641. King and horse are carved on a mountain at Tak-i-Bostan (page 395).