EN
The article deals with diaries as one of the important archive materials that allow closer recognition of everyday life of members of the Society of Jesus in the early modern age and which originally served as a source of information for writing the history of individual monastic houses. It briefly introduces basic rules for writing diaries, their types, and characteristics of the records as well as Czech historians who paid them greater attention in their works. The obtained findings are presented in detail on the life of a monastic community depicted on the basis of a single preserved diary from the monastic college in Hradec Králové “Diaria Collegii Reginaehradecensis” dated 1662–1666, which was written by its rector P. Václav Kolčava (1623–1680). The essay includes a list of surviving monastic diaries from the Bohemian, Moravian and Silesian monastic houses closed in 1773 including the place of their storage.