Solvay Conference, 1911 (first conference) Group photograph of the attendees of the first Solvay Conference on Physics, held at the Hotel Metropole in Brussels, Belgium. This photograph was taken on 2 November 1911, the penultimate day of the conference. Back row (left to right): R. Goldschmidt, M. Planck, H. Rubens, F. Lindemann, F. Hasenöhrl. Second row (left to right): W. Nernst, M. Brillouin, A. Sommerfeld, M. de Broglie, G. Hostelet. Third row (left to right): E. Solvay, M. Knudsen, E. Herzen, J. H. Jeans, E. Rutherford. Fourth row (left to right): H. Lorentz, E. Warburg, W. Wien, A. Einstein, P. Langevin. Front row (left to right): J. Perrin, M. Skłodowska-Curie, H. Poincaré, H. Kamerlingh Onnes. 1911