The article discusses the concentration of Martin Luther’s theology on the Christian existence. There are three main areas pointing to this key idea. Firstly, the description of justification of the people in the categories of freedom gained through the experience of faith, which leads to a thankful service towards one’s neighbour. Secondly, sacramental understanding of the working of God’s Word as a performative that changes the world. It defines not only the understanding of the sacraments, with the key role of Baptism as a foundation for everyday actualisation of Christian life in penance, which strives for fighting off the sinfulness of an old, sinful man, and leads to building the man’s own justice based on the alien justice of Christ, but it is also the basis for the communion of believers – the church, as well as for the orders of creation, which structure the current reality. Thirdly, the remarks on theological knowledge closed in the triad prayer–meditation–temptation and theological weight of the experience of differentiating between the Law and the Gospel.

The medieval manuscripts of St. Mary’s Church Library ( Biblioteka Mariacka) are the oldest part of the collections of the Gdansk Library, with some items dating back to the 12th century. In view of their topics and history, they provide a priceless testimony to the history of Pomerania. The value of the manuscripts lies not only in their contents and ornamentation, but also in the fact that they include parchment documents bound by Gdansk bookbinders, which have survived in an excellent condition. The uniqueness of the collection was confirmed by the missal Missale secundum notulam dominorum Teutonicorum (Ms. Mar. F 332) being entered on UNESCO’s “Memory of the World” Polish National Register in 2016.
After 1921, not a single study discussing the provenance of books kept in St. Mary’s Church Library was written. This paper is an attempt to partially fill in the gap – to indicate the scribes and owners of the most valuable manuscripts. Among the latter, special attention should be devoted to clergymen connected with St. Mary’s church: Andreas Slommow, Heinrich Calow, and Johannes Zager, a lawyer Nicolaus Velan, and a scribe Johannes Rasoris from Nidzica.
For the purposes of this article, books kept by the Library were divided into sections: theology, philosophy, law and medicine; manuscripts related to the Teutonic Order were also given a separate section. Such a division may help the readers use the library holdings. The text also discusses the most important wartime losses.