The book contains the works of L.D. Block about ballet, written by her in the 1930s. The first section is her work "The emergence and development of the technique of classical dance (the experience of systematization)." The author considers classical dance here as a certain system that has developed as a result of the enormous professional work of many generations of people who sought to achieve the greatest expressiveness of the movements of the human body. The second section includes fragments of the book "Notes on Didlo's Ballets" and articles on Soviet ballet of the 1930s.