What is a holy roman emperor?

The Holy Roman Emperor was the ruler of the Holy Roman Empire, a multi-ethnic complex of territories in central Europe that existed from the early Middle Ages until 1806. The title was often associated with the idea of a divinely sanctioned authority, intended to revive the Western Roman Empire's legacy. Emperors were elected by a group of prince-electors, and their reigns varied widely in power and influence, often depending on the political landscape of the time. Notable emperors include Charlemagne, who was crowned in 800, and Franz II, the last emperor, who abdicated in 1806.