Lunch in honour of Albert Einstein, with (front row) Paul Langevin, Einstein, Comtesse de Noailles, Paul Painlevé. Photograph by H. Manuel, 1922.

"This photo was taken in Paris, France, and most likely at the home of Paul Langevin, who had invited Einstein to Paris. Those seated are (l. to r.): Langevin, Einstein, Anna Comtesse de Noailles, and Paul Painleve. Those standing are (l. to r.): Thomas Barclay, Leo Strisower, Paul Appell, Emile Borel, and Henri Lichtenberger."—Archives Center, Institute of Advanced Study, Princeton