The never before published paper is one of the last writings of Juliusz Żórawski (1898–1967), professor architect and theoretician of architecture. The notion of limited complexity introduced here relates to individual characteristics of the conceptual abilities of man. Tasks of architecture are based on prognoses, and this brings with it the risk of making errors. The author criticises J. Fourastié’s prognoses related to the Earth’s overpopulation in 3000 AD, which would force building new cities above the ground, contrary to human psychosomatic nature and habitude.

The paper presents the meaning of complexity as a notion in psychology, and its influence on architectural theory in the 1960s, focusing on the notion of optimal complexity. A commentary is presented on the two texts („Network of straight lines” and „Limited complexity”) by professor architect Juliusz Żórawski from 1967, where he has introduced the term of limited complexity in relation to architecture, and where he criticizes excessively far reaching forecasts of future development. Żórawski’s concepts are parallel to those of R. Venturi at that time.