Group portrait of attendees to Institut International de Physique Solvay (1927)

Group photograph of the scholars, including Albert Einstein, who attended the fifth Institut International de Physique Solvay, which was held in Brussels, Belgium, from October 23-29, 1927. Pictured, from left to right, are: (first row): Irving Langmuir, Max Planck, Marie Curie, Hendrik Antoon Lorentz, Albert Einstein, Paul Langevin, Charles-Eugène Guye, Charles Thomson Rees Wilson, Owen Willans Richardson

second row: Peter Josef William Debye, Martin Knudsen, William Lawrence Bragg, Hendrik Anthony Kramers, Paul Adrien Maurice Dirac, Arthur Holly Compton, Louis de Broglie, Max Born, Niels Bohr

back row: Auguste Piccard, Emile Henriot, Paul Ehrenfest, Edouard Herzen, Théophile de Donder, Erwin Schrödinger, Jules-Émile Verschaffelt, Wolfgang Pauli, Werner Heisenberg, Ralph Howard Fowler, Léon Brillouin.