The Lanckoronski Foundation was the patron of the international conference entitled “Private Collections of Ancient Books”, which was organized by the Ossolineum and held in Wrocław on 18-19 June 2019. The aim of the conference was to gather together and publicize information about former private collections of the Polish-Lithuanian Republic, Silesia and Pomerania, which are presently, in whole or in part, maintained in Polish libraries, archives and museums as well as those abroad. This conference was designed to constitute a further step towards reaching a deeper knowledge and academic historical reconstruction of book collections throughout the ages. 26 June 2019