This thesis highlights that the life of the Reformed Church of Uzon in the 18th century was far from free of difficulties. The community was struck by fires and wars, while internal tensions and conflicts (such as disputes over the seating order in church) also undermined its cohesion. A deeper understanding is provided through the study of the history of the Sepsi Church District, primarily on the basis of the works of Kolumbán, Tóth, Pokoly, and Juhász. The thesis also examines the movable and immovable property of the congregation, relying chiefly on the Annotamenta Ecclesiae Uzoniensis Reformatorum (1648–1717) and the Liber Ecclesiae, which continues up to 1744. Further important sources include the studies of Árpád Csáki, the description of the church by Kinga Tüdős, and data provided by Barna-András Ungvári, the current pastor. As part of the research, document-value records preserved exclusively in the parish archives have been digitized. In view of the length of the original manuscript, however, the transcription has remained incomplete and selective.