The study presents the figure of Adam Count Potulicki (1849–1920), dean of the Metropolitan Chapter of St Wenceslas in Olmütz, in light of his personal archival estate kept in the Olomouc branch of the Provincial Archive in Opava. This archive file has not yet been the subject of wider scientific interest, but it is worth noting for its richness and thematic diversity. The materials contained therein provide, on the one hand, much valuable information about the life, activities and interests of the creator of the legacy himself, and, on the other hand, they are also a rich source of knowledge for research into the genealogy of the Potulicki family, the families related to it, the history of the Church and various other institutions of the time.