The 1925 concordat (agreement) between the Holy See and the Second Polish Republic had 27 articles, which guaranteed the freedom of the Church and the faithful. It regulated the usual points of interests, Catholic instruction in primary schools and secondary schools, nomination of bishops, establishment of seminaries, a permanent nuncio in Warsaw, who also represents the interests of the Holy See in Gdańsk. It was considered one of the most favorable concordats for the Holy See, and would become a basis for many future concordats.
The Roman Catholic religion was the religion of majority of the citizens in the Second Polish Republic (see also demographics of the Second Republic). The Polish constitution of 1921 stipulated in Article 114 that the "Roman Catholic faith, the religion of majority of the nation, takes first place among the equally important faiths in the country. The Roman Catholic Church governs itself. Relation to the Church will be determined based on the treaty with the Holy See, upon ratification by the Sejm (Polish parliament)." The negotiations started in 1921, and the Polish side (Minister of Religion and Education, Maciej Rataj, lawyer Władysław Abraham and bishop Adolf Szelążek) drafted a proposal by 1923. Then the negotiations were taken over by Stanisław Grabski, who represented the endecja faction, then dominant in the government. The negotiations between Grabski and Francesco Borgongini Duca spanned four months and 23 meetings in Rome. The concordat was signed on 10 February by Pietro Gasparri, Cardinal Secretary of State for the Holy See and Stanisław Grabski and Wladyslaw Skrzyński for Poland.