Dominus noster

The term dominus noster (Latin for "our lord") represents an imperial style used in the Roman Empire during late antiquity. It became formalized under Diocletian and the Dominate, appearing on coinage, inscriptions, and in imperial law.

Dominus noster, often abbreviated as DN, continued to appear on coins issued by Eastern Roman emperors until the eighth century, ceasing to be used systematically after 717 and disappearing by the end of that century. After the fall of the Western Empire, rulers of the barbarian kingdoms in the West also adopted the title to associate themselves with Roman authority, while acknowledging the continued supremacy of the Eastern emperors.