The collections of the Major Seminary in Pelplin include a 15th-century copy of documents addressed to the Cistercian monastery in Pelplin (Gdańsk Pomerania). It was used as a source of extremely valuable material by many 19th-century researchers of West Prussian documents and the history of the Pelplin Abbey, including: G. E. Strehlke, M. Perlbach, S. Kujot and R. Frydrychowicz. What is quite surprising is that it has not received much attention since 1918. It was ignored even by the editors of subsequent volumes of the Preussisches Urkundenbuch. The creation of the copy shop was undoubtedly associated with the participation of Jan Skoter, a steward from Pelplin. In the years 1417-18, he managed to obtain a number of documents for his monastery from various church dignitaries, including four bulls of Pope Martin V. Copies of these documents became the basis of the copy shop. Subsequent items were entered in chronological order. They included a number of statutes issued by the bishops of Włocławek, Polish kings, Pomeranian princes and grand masters of the Teutonic Order. The analysis of the order of entries and paleographic evidence shows that the copybook was created in the years 1418-1421, probably at the turn of 1418 and 1419. The copybook was prepared by Abbot Piotr Honigfeld (1402-37), who ordered a number of liturgical and liturgical books to be copied in the Pelplin scriptorium. economic. From a paleographic point of view, the copier has many connections with Liber usuum, written in 1409 by the Pelplin monk Nicholas Junge.