Oil on canvas; 228.5 cm × 307.5 cm (90.0 in × 121.1 in). National Portrait Gallery, London, England.
Copley depicts the collapse of William Pitt the Elder (1st Earl of Chatham, Prime Minister of Britain who won the Seven Years War against the French) on 7 April 1778, during a debate in the House of Lords on the American Revolution.
Compare Benjamin West’s earlier painting, The Death of Chatham, from 1778.