Seven Powers Conference in London, 1931 (b/w photo)

London, England, Great Britain The participants of the Seven Powers Conference in London after the first plenary session, front row from left: Andrew Mellon, American Secretary of the Treasury, Pierre Laval, French Prime Minister, Ramsay MacDonald, British Prime Minister, Henry Lewis Stimson, American Secretary of State, Arthur Henderson, British Foreign Minister, back row (without hats) from left: Philippe Berthelot, French ambassador in London, ?, Jules Renkin, Belgian Prime Minister, Paul Hymans, Belgian Foreign Minister, Aristide Briand, French Foreign Minister, behind them: Matsudeira, ?, Heinrich Bruening, German Reich Chancellor, ?,?, Dino Grandi, Italian Foreign Minister, ?, Francois Pietri, French Colonial Minister.