England is a constituent country within the United Kingdom, occupying the southern two-thirds of the island of Great Britain. It is the most populous of the UK's four nations, with over 56 million residents, and its capital, London, serves as the UK's political, economic, and cultural epicenter. England's history spans from Roman Britannia and Anglo-Saxon kingdoms through the Norman Conquest, Tudor dynasty, and Industrial Revolution to its modern role as a global financial and creative hub. The English legal system (common law) and the English language—now the world's lingua franca—are among its most enduring global legacies.