This Soviet Union stamp, issued in 1966, commemorates the International Congress of Mathematicians (ICM) held in Moscow. The design features a stylized globe with mathematical symbols and the ICM emblem at the center, symbolizing global collaboration in the field of mathematics. The surrounding inscriptions in Russian read “Международный Конгресс Математиков” (“International Congress of Mathematicians”). The denomination “6 kopeks” is shown at the bottom right.

This issue celebrates not only the mathematical sciences but also the Soviet Union’s significant role in hosting one of the world’s most prestigious academic gatherings. It remains a notable thematic stamp for collectors interested in science, mathematics, and international congresses.