Summary: Is it possible to employ a biographical approach to studies on popular piety in early modern (16th and 17th century) Poland? If we use a broadened understading of the category of egodocument, we would be able to find sources allowing for such research. They include, i.a., texts of ecclesiastical provenance (e.g., visitation reports or devotional works, including those published) describing miraculous apparitions. The paper, based on the aforementioned texts, presents the biographies of three visionaries of peasant origin who in 16th and 17th century allegedly experienced Marian apparitions. All three cases fall in principle within an early modern narrative scheme concerning such events and lives of people experiencing them, but provide also personalized biographical data. First of the presented visionaries is Jan Mikosz from Męcina, who received his visions already before 1565. The cult he had initiated did not meet with church’s approval and vanished despite a favorable stance among the local clergy. A second example is Jakub Ruszczyk (1640) – a visionary from Krasnobród, possessed by the devil – whose story became a part of devotional publications, although, because of his controversial status, was not particularly emphasized or developed. The third visionary, Tomasz Michałek, who experienced an ap-parition in Leżajsk in 1590, was treated differently – his story has been incorporated into the official history of the sanctuary, and many authors from the Bernardine order stylized it as a hagiography; for this reason, despite numerous sources and traditions, going beyond legend is practically impossible when his biography is concerned.