Albert Einstein engaging in animated conversation with British Prime Minister Ramsay MacDonald, surrounded by a group of luminaries including the Nobel Prize-winner Max Planck, far right, and other German political and business leaders, smoking cigars and sipping cognac. The reception was given by Reich Chancellor Brüning in honour of the visiting British Prime Minister in August 1931. [A few days after his return from Germany, on 24 August, MacDonald resigned as the Premier over the budget cuts]. From left to right Planck, MacDonald, Einstein, Finance Minister Hermann Dietrich, Privy Counsellor Schmitz (of IG Farben) and Foreign Minister Julius Curtius.
“You have no idea with what affection I am surrounded here, they are not all out to catch the drops of oil my brain sweats out,” Einstein noted.
Photo by Erich Salomon
Iconic Photos 
Max Planck is on the far left side of this photo, not the right.