EN
Since the middle of the 1690’s, the so-called supplementa historiae belonged among the basic official documents used within the Jesuit Order to preserve the memory. They are often considered as mere summaries of annual reports of the order (litterae annuae) and thus not very frequently used by the researchers. The article describes the formation, structure and the form of this type of documents within the Bohemian Province. On the example of texts that were written in the house of the Jesuit Order in the town of Telč, it shows the relation between the supplementa and the annual reports, it evaluates their information value and it discusses their authorship.