The city of Leningrad. City views. The building of the Institute and Museum of Ethnography of the USSR Academy of Sciences. A collection sent from Mexico on the history of Indian peoples. Photos taken in the territory of the former Mayan state. Institute researcher Yu. V. Knorozov, who deciphered the Mayan hieroglyphs, at work in his office. Book by Yu. V. Knorozov. Yu. V. Knorozov gives interviews, talks about Mayan hieroglyphs.