Politically, Great Britain refers to the island together with a number of surrounding islands, which constitute the territory of England, Scotland and Wales. The island of Ireland lies to its west.
Great Britain is part of the sovereign state of the United Kingdom of Great Britain and Northern Ireland, constituting most of its territory: most of England, Scotland and Wales are on the island of Great Britain.
The Kingdom of Great Britain resulted from the union of the kingdoms of England (comprising modern-day England and Wales) and Scotland in 1707. Subsequently, in 1801, the Kingdom of Great Britain united with the neighbouring Kingdom of Ireland forming the United Kingdom of Great Britain and Ireland. When five-sixths of Ireland seceded from the United Kingdom in 1922, the state was renamed the United Kingdom of Great Britain and Northern Ireland.