The collection of documents for the first time introduces into scientific circulation a corpus of main sources containing information about the trial of former figures of the Kolchak regime. The core of the collection consists of transcripts of eleven sessions of the Extraordinary Revolutionary Tribunal of Siberia. The first chapter publishes documents reflecting the plan and progress of preparations for the trial. The last chapter contains documents about the behavior of the defendants during the trial and the fate of the convicts after the verdict. The book is intended for researchers, teachers and graduate students of higher educational institutions specializing in the study of Russian history of the 20th century.