The term 'Large Realm' can be summarized as an EMPIRE, which is a political unit consisting of multiple nations or peoples under one supreme authority. Empires have existed throughout history and have been formed through conquest, diplomacy, and other means. Empires are typically large in size and scope, and often span multiple continents. They are usually characterized by a hierarchical structure of power, with the emperor at the top and various levels of nobility below him. Empires have had a major impact on world history, and many of the world's most powerful nations have been empires at some point in their history.