This book is a collection of memoirs of the participants of the II Congress of the RSDLP, at which the Bolshevik Party was created in 1903. The main part of the book is printed according to the text of the collection "Memoirs of the Second Party Congress," published by Partizdat in 1934. Memoirs of M. N. Lyadov are printed according to the text of his unpublished manuscript. Individual memories are given in abbreviated form. The book opens with an article by I. Lenin "The Story of the II Congress of the RSDLP. "The collection was prepared for publication by N. N. Surovtseva and R. 3. Yunitskaya.