Emperors and empresses are often crowned or enthroned, and may hold their position until death, abdication, or overthrow. They may be selected through heredity, election, or military conquest, and may rule over a single nation or a vast empire.
In many cultures, emperors and empresses are considered to be semi-divine or divine, and may be worshipped as gods or goddesses. They may have religious as well as political power, and may be considered to be the source of all law and authority.
Emperors and empresses have played a major role in world history, and have often been central figures in major events and developments. They have shaped the course of nations and civilizations, and have left a lasting legacy on the world.