The aim of this study was to undertake an analysis of the elections to the Legislative Sejm in 1919 in the area of Płock Mazovia. The main thesis statement of this research paper was that in the first general parliamentary
elections in the district of Płock-Płońsk-Sierpc the following issues played the decisive role: the defense of the presence of religion in public schools, the role and place of the Church in public life, as well as opposition of
voters to radical political methods and radical social reforms. The research subject in this book encompasses the preparation, organization, course and outcome, as well as the political consequences of the elections to the Legislative Sejm, which were held in the Electoral Constituency No. 6 including the counties: Płock, Płońsk and Sierpc.