Bogna Bohdanowicz – musicologist, photographer, author of documentaries. In 2006, she defended her doctor thesis at the Faculty of History at the University of Warsaw („Średniowieczne księgi klarysek polskich” Medieval music-liturgical books of Poor Clares in Poland), promotor prof. dr hab. Mirosław Perz). From 2013 co-initiator and lecturer of the course of Gregorian chant according to the method of Solesmes. He currently works in the study of church music of the Archdiocese of Łódź (Studium of Church Music). Within hers interests is Gregorian chant, its sources and the practice of singing.