Issued by the USSR (Soviet Union) in 1981, this commemorative stamp highlights modern architectural development in Warsaw, symbolizing urban planning and socialist international cooperation. The design represents the theme “Architecture – Man – Environment,” emphasizing harmony between human society and modern city structures. The geometric architectural motif reflects late Soviet-era graphic minimalism popular in scientific and industrial-themed issues. Released within the framework of cooperation among socialist nations, the stamp connects architecture with technological progress and environmental awareness. A visually striking Cold War–period thematic collectible valued for both design and historical context.