50 years after his death, the book provides a new, complete and detailed description of the life and work of Ivan Léonidov through a collection of essays and documents. It reconsiders his creative and professional career, and examines how it fits into the Russian and international architectural context. An exhaustive and extraordinary series of illustrations from the Russian archives where the architect's work is kept, many of which are published here for the first time, give an insight into his designs and the artistic and creative career of one of the leading exponents of Russian design culture in the 20th century.