EN
The article describes one of the oldest Polish 17th century sale catalogues of a private library. The catalogue presents an opportunity to get insight into composition and editorial issues of this type of publications. Not only does it show the beginnings of book auctions in Poland, but also allows to look into an interesting collection of books gathered by the Niclassius family of Gdansk. Part of the collection are over 220 Polish books which equals approx. 15% of the collection. This considerable number was unique in Gdansk libraries and may be explained by the fact that the clergymen who owned the library served at St. Peter and Paul's church which was a strong Polish center at the time.