Solvay Conference, 1913 (second conference) Group photograph of the attendees of the second Solvay Conference on Physics, taken outside the Institute of Physiology in Leopold Park, Brussels, Belgium. Back row (left to right): J. É. Verschaffelt, M. von Laue, H. Rubens, R. Goldschmidt, E. Herzen, F. Lindemann, M. de Broglie, Pope, E. Grüneisen, G. Hostelet. Middle row (left to right): F. Hasenöhrl, J. H. Jeans, W. H. Bragg, M. Skłodowska-Curie, A. Sommerfeld, A. Einstein, M. Knudsen, P. Langevin. Front row (left to right): W. Nernst, E. Rutherford, W. Wien, J. J. Thomson, E. Warburg, H. Lorentz, M. Brillouin, W. Barlow, H. Kamerlingh Onnes, R. W. Wood, L. G. Gouy, P. Weiss. 1913