In this article the author tries to present the history of the pastoral ministry of the Missionary Fathers in the parish of St Vincent de Paul in Bydgoszcz. The article deals mainly with the history of the parish and the church during the first 50 years of its existence and the construction of the church. It is not a complete monograph of the parish or the missionary house, but a selection of issues that seemed particularly important. The article is in two parts. The first part deals with the problems of the formation and functioning of the parish community in the inter-war and post-war period. The second part contains a description of the history of the architecture of the church and the house, a definition of the style of the complex, including an indication of the prototypes and principles of design, and their evaluation from the point of view of architectural correctness and functionality.