George IV was king of the United Kingdom of Great Britain and Ireland and king of Hanover following the death of his father, King George III, on 29 January 1820, until his own death ten years later. From 1811 until his accession, he served as regent during his father's final mental illness.
George IV was the eldest child of King George III and Queen Charlotte. He led an extravagant lifestyle that contributed to the fashions of the Regency era. He was a patron of new forms of leisure, style and taste. He commissioned John Nash to build the Royal Pavilion in Brighton and remodel Buckingham Palace, and Sir Jeffry Wyatville to rebuild Windsor Castle.