Conference on physics organized in Brussels

At the beginning of the past century, the industrialist and philanthropy Belgian Ernest Solvay used part of his fortune in organizing several conferences on physics to which the privileged minds more of the moment were invited.

Complete list of assistants:

(Superior Row, of left to right)
A. Piccard, E. Henriot, P. Ehrenfest, Ed. Herzen, Th. Of Donder, E. Schrödinger, E. Verschaffelt, W. Pauli, W. Heisenberg, R.H. Fowler, L. Brillouin.

(Intermediate Row, of left to right)
P. Debye, M. Knudsen, W.L. Bragg, H.A. Kramers, P.A.M. Dirac, A.H. Compton, L. of Broglie, M. Born, N. Bohr.

(Inferior Row, of left to right)
I. Langmuir, M. Planck, Madame. Curie, H.A. Lorentz, A. Einstein, P. Langevin, Ch. E. Guye, C.T.R. Wilson, and O.W. Richardson.