The other thing worth mentioning, because you'll hear this in various history classes when you talk about the Persian Empire, is the great cities of the Persian Empire. Osiris the Great, he establishes a capital at Pasargidae right over here. You have Cambyses, establishes a capital at Susa. Susa is one end of the great royal highway that goes from Sardis all the way to Susa right over there. You have Darius the Great, establish a capital at Persepolis, and that's the Greek name for it, literally referring to Persian city, and this is a relief from Persepolis right over here. Now, the end of the Achaemenid Dynasty comes when that famous thorn in the side, Greece, actually unifies under Philip of Macedon, and here we're talking about the early to mid fourth century BCE, and his son Alexander becomes this great conqueror, Alexander the Great, and he's able to conquer the entire Persian Empire, famously taking it away from Darius III. We talk about that in another video, or in several videos in some detail.