Participants of the 5th Solvay Congress

Some of the greatest names in 20th century physics were present at the October 1927 Fifth Solvay International Conference on Electrons and Photons (Image: Benjamin Couprie/Wikimedia Commons)

The International Solvay Institutes for Physics and Chemistry in Brussels, Belgium, were founded by Belgian industrialist Ernest Solvay in 1912, following the historic invitation-only 1911 Conseil Solvay, considered a turning point in the world of physics.

Back row (standing, left to right) A Piccard, E Henriot, P ehrenfest, E Herzen, Th De Donder, E Schroendinger, E Verschaffelt, W Pauli, W Heisenberg, R H Fowler
Middle row (sitting, left to right) P Debye, M Knudesen, W L Bragg, H A Kramers, P A M Dirac, A H Compton, L V De Broglie, M Born, N Bohr
Front row (sitting, left to right) I Langmeir, M Planck, M Curie, H A Lorentz, A Einstein, P Langevin, Ch E Guye, C T R Wilson, O W Richardson

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