XXIII Congress of the CPSU in Moscow

USSR. Moscow. April 1966. Chairman of the Presidium of the East Siberian Branch of the Siberian Division of the USSR Academy of Sciences Mikhail Mikhailovich Odintsov, Chairman of the Presidium of the Siberian Division of the USSR Academy of Sciences Mikhail Alekseevich Lavrentyev, President of the Academy of Sciences of the Georgian SSR Nikolai Ivanovich Muskhelishvili and Vice President of the USSR Academy of Sciences Nikolai Nikolaevich Semenov (from left to right) during a conversation during a break between sessions of the 23rd Congress of the Communist Party of the Soviet Union in the Kremlin Palace of Congresses. The exact date of the photo is unknown. Evgeny Kassin, Vladimir Savostyanov/TASS