This flag, for the long-defunct Benin Empire, may just be the ne plus ultra of sigils. I think that when I am god-emperor of some distant land, I shall install it as my standard.
I write books. My latest is a YA science fiction novel called Homeland (it's the sequel to Little Brother). More books: Rapture of the Nerds (a novel, with Charlie Stross); With a Little Help (short stories); and The Great Big Beautiful Tomorrow (novella and nonfic). I speak all over the place and I tweet and tumble, too.