The "King of Great Britain" refers to the reigning monarch of the United Kingdom, which includes England, Scotland, Wales, and Northern Ireland. The title has evolved over centuries, with the current monarchy tracing its lineage back to the unification of the crowns of England and Scotland in 1603. The king's role is largely ceremonial, with real political power resting in the Parliament. As of October 2023, the current king is Charles III, who ascended the throne following the death of his mother, Queen Elizabeth II, in September 2022. The king participates in various state functions, represents the nation internationally, and fulfills duties related to the Church of England.