The authors of the article broadcast information about the study of the compositional activity of architects of Soviet Russia in the 20s of the XX century. in line with the trend of "constructivism". The study of three-dimensional architectural composition is considered by the authors as the separation of the "indivisible whole" (integrity – the law of composition) and "unchangeable for further im-provement" (it is impossible to make changes without deterioration of the already created, completed composition) artificially created object – organism of universal laws and means. The authors believe that the study of high–class Heritage samples is based on the separation of formal (composite) ele-ments (contrast, plastic, texture, plane – volume, rhythm, modular divisions, construction, engineering materials, walls, floors, ceilings, fasteners, etc.) from an artificially created composite organism. The analysis allows you to develop compositional thinking, taste and teaches you to understand the course and origins of the Master's compositional thought. The study of the formal (compositional) sphere of the Heritage of the classics of modernity and past eras allows you to build the path of the author's work on the project, avoiding mistakes and disappointments.