Sacrum Rōmānum imperium.
“Holy Roman Empire.”
The Holy Roman Empire continued the empire founded in 800 CE by Charlemagne, who revived the title of Roman Empire in Western Europe. Charlemagne’s successors, the Carolingians, considered the Roman Empire suspended, rather than ended, by the abdication in 476 CE by Romulus Augustus. As a phrase, “Holy Roman Empire” designated a political entity that originated with the coronation of the German king Otto I as emperor and survived until Francis II renounced the imperial title in 1806.
From Latin for the New Millennium