Decades and centuries pass, moving away from us many historical events, the significance of which is difficult to assess now, without having at hand factual material that sheds light on the true course of affairs. This seven-volume publication, containing stenographic reports of interrogations and testimonies given in 1917 at the Extraordinary Commission of Inquiry of the Provisional Government, reproduces with scientific accuracy materials of historical significance intended not only for historians, but also for the general readership.