The contributions included in this volume address issues related to contemporary problems of publishing archival sources, legal aspects of access to archival sources created in the 20th century, electronic documents – their mass nature, peculiarities and gaps in the 20th century documentation, as well as sources serving to transfer values and knowledge between generations. The subject of the articles is the description of a wide spectrum of issues concerning the everyday lives of prominent individuals and the documentation thereof. It is imperative to acknowledge the foundational significance of this element in the context of civilisation’s evolution, the shaping of international relations, and the dynamics of geopolitics.