1. A high official or advisor or minister, especially in certain Muslim countries or caliphates.
"Grand Viziers were always scheming megalomaniacs. It was probably in the job description: 'Are you a devious, plotting, unreliable madman? Ah, good, then you can be my most trusted adviser.'"
Posted the found picture above yesterday. It was only a matter of time before we got pro fanart, I s'pose.