Hope it's mad enough. The text is a famous quote by the Roman emperor Caligula, on whom Cartagia was based; it means "Let them hate, so long as they fear".
Another quote, this time from the show.
Elric: As I look at you, Ambasador Mollari, I see a great hand reaching out of the stars. The hand is your hand. And I hear sound; the sounds of billions of people calling your name.
Ambassador Londo Mollari: My followers?
Elric: Your victims.
Feedback welcomed. If you like the icons, feel free to use them wherever / however you like.