The allied sovereigns attending a review in Hyde Park, 1814.
From left. Duke of Wellington. King of Prussia. Prince Regent (George IV). The Emperor of Russia.
Source: The Reminiscences and Recollections of Captain Gronow, being anecdotes of the camp, court, clubs and society, 1810-1860. By Captain Rees Howell Gronow (1794–1865). Published: London, John C. Nimmo, 1889. Artist Joseph Grego (1843-1908).