Panorama of the city of Plovdiv (Bulgaria). August 31, 1952. Opening of the exhibition. Panorama of the exhibition. Types of pavilions: Soviet Union, BNR, Poland, Hungary, China. Interior view of the pavilion of the USSR. Visitors to the exhibits. A site near the Soviet pavilion with exhibit machines. Deputy Chairman of the Council of Ministers of Bulgaria and member of the Politburo of the Bulgarian Communist Party Raiko Damyanov makes an entry in the guestbook.