The course "Anatomy of Structures 2019/20" of the Technology module at MARCH Architecture School was organized along with the exhibition “Shukhov. Formula of Architecture", held at the Shchusev Museum of Architecture from October 2019 to January 2020. The purpose of the "anatomy lesson" was to study outstanding works of structural engineering of the late 19th and early 20th centuries, in particular, metal wide-span spatial structures, which signify the transition from planar (2D) to spatial (3D) systems, unique for the theory and practice of structures, that occurred in 1880-1920. Six iconic buildings were selected as objects of research, illustrating various stages of this transition.