George IV was King of the United Kingdom of Great Britain and Ireland and King of Hanover from 29 January 1820 until his death in 1830. At the time of his accession to the throne, he was acting as prince regent for his father, King George III, having done so since 5 February 1811 during his father's final mental illness.

The Royal Pavilion, and surrounding gardens, also known as the Brighton Pavilion, is a Grade I listed former royal residence located in Brighton, England. Beginning in 1787, it was built in three stages as a seaside retreat for George, Prince of Wales, who became the Prince Regent in 1811, and King George IV in 1820. It is built in the Indo-Saracenic style prevalent in India for most of the 19th century. The current appearance of the Pavilion, with its domes and minarets, is the work of architect John Nash, who extended the building starting in 1815. George IV's successors William IV and Victoria also used the Pavilion, but Queen Victoria decided that Osborne House should be the royal seaside retreat, and the Pavilion was sold to the city of Brighton in 1850.