This collection of 101 short communications, submitted by some of the participants at the 11th Nuclear Workshop held in Suzdal, USSR, 18-23 September, 1989, provides a representative survey of the material presented at the Workshop. Articles have been submitted by both those who delivered lectures and those who had poster presentations. The order of presentation at the Nuclear Workshop is roughly maintained within this proceedings book, but the session titles within the scientific program have not been utilized as discrete subdivisions within the book, because of the considerable overlap of subject matter. The overall sequence is as follows: Genome structure, Gene Structure and Expression, Nucleolar Genes, Structure and Proteins, Chromatin and Nuclear Granules, Nuclear Matrix and Nuclear Proteins, Replication and Transcription and finally Nuclear Envelope and Nuclear Cytoplasmic Transport. Several articles on Nuclear Lipids are also included, stemming from an evening round-table discussion on lipids. The third Wilhelm Bernhard Lecture was delivered in Suzdal by Professor Harris Busch, who can be seen in the photograph above (on the left) in the presence of Professor Ilya B. Zbarsky, President of the organizing committee for the 11th Nuclear Workshop. (Previous Wilhelm Bernhard lecturers have been Ronald H. Reeder, in Krakow, Poland, 1985 and Oscar L. Miller, Jr. , in Stevensbeek, The Netherlands, in 1987).