ancient civilisations and empires in history

let's list 'em.
off the top of my head, there's ancient greece (philosophy! sculpture! tragedy!), rome (gladiators), the byzantine empire/constantinople (mosaics, awesome architecture), ancient india (uh.. elephants?), ancient egypt (pyramids and papyrus!) .. ancient china (vases, funny hats and robes), feudal japan (ninjas)

am I missing any? add please.

And ancient underwater ruins that are obviously remains of once powerful supercivilization that conquered whole world with animated series, comics, shitty RPGs, pixelated pornography and lolitas, oh wait...