Quaesitor
The quaesitor (Greek: κοιαισίτωρ, κυαισίτωρ) was a Late Roman/Byzantine police official of Constantinople, specifically a magistrate, responsible for controlling the flow of legal and illegal immigration into the capital city of Byzantium. The office of the quaesitor was first established in 539 through the Novella 80 of Emperor Justinian I (r.