Issued by Poland in 1950, this striking 15 złoty stamp commemorates the Peace Congress held in Warsaw (“Kongres Pokoju Warszawa 1950”). The design features a symbolic composition of a worker holding a hammer, accompanied by a dove—an international emblem of peace—reflecting post-war socialist ideals and reconstruction themes. The engraving style is bold and detailed, typical of mid-20th century Eastern European philatelic art. Inscribed “Poczta Polska”, this issue is part of Poland’s political and ideological commemoratives of the era. Its historical context and strong visual symbolism make it a desirable addition for collectors of Cold War, propaganda, or peace-themed stamps.