During the time of the Mongol Empire, the “Gerege” was a diplomatic passport issued to emissaries and envoys. It granted them safe passage, food, horses, lodging, and guides across the vast territory of the empire. It was the world’s first form of a universal travel token—unparalleled in any other civilization, even the Roman Empire. The holder of a Gerege traveled freely and received honorable hospitality, symbolizing power, trust, and international authority.