The popular science film "Patron" is dedicated to the Russian entrepreneur of the late 19th century S. I. Mamontov, whose help largely determined the fate of many famous artists, musicians, actors and theatrical figures. The film uses the technique of an actor's story from different persons of the described events. The film uses family photographs of the Mamontovs, personal belongings. Types of the museum-estate "Abramtsevo", the former house of the Mamontovs on Sadovo-Spasskaya street. Students in the classrooms of the Polygraphic Institute. The film uses newsreel footage from the beginning. Х1Х century: railway transport, types of Moscow, Nizhny Novgorod.