An emperor (through Old French empereor from ) is a monarch, usually the sovereign ruler of an empire or another type of imperial realm. Empress, the female equivalent, may indicate an emperor's wife (empress consort), mother (empress dowager), or a woman who rules in her own right (empress regnant). Emperors are generally recognized to be of a higher honour and rank than kings. In Europe the title of Emperor was, since the Middle Ages, considered equal or almost equal in dignity to that of Pope, due to the latter's position as visible head of the Church and spiritual leader of Western Europe. The Emperor of Japan is the only currently reigning monarch whose title is translated into English as "Emperor".

Wrath of the Tyrant is the first demo album by the Norwegian black metal band Emperor. It was recorded in May 1992 and self-released by the band shortly after. Compared to Emperor's later work, the style of the album is much closer to death metal.