The title "Emperor of Ethiopia" refers to the sovereign ruler of the Ethiopian Empire, a historical kingdom in East Africa. The most notable emperor was Haile Selassie, who reigned from 1930 to 1974. He is remembered for his efforts to modernize Ethiopia and for his role in the establishment of the Organization of African Unity. The Ethiopian monarchy has ancient roots, tracing back to the Solomonic dynasty, which claimed descent from the biblical King Solomon and the Queen of Sheba. The emperor held significant religious and political authority, symbolizing unity and continuity in Ethiopian culture and history.