This thesis presents old church folk (glagolitic) chants from Pag, transcribed for the first time according to the sound records of Jerko Bezic in 1964, stored in the collection of the Old Church Slavonic Institute in Zagreb, as well as the sound records of the concert performed by the Mixed Choir of the Assumption of the Blessed Virgin Mary from Pag, held in the church of St. Donat, Zadar in 2000. By transcribing and analyzing comparative records in a notorious music notation software Sibelius, the author revitalizes and presents an important part of the cultural heritage of Pag and gives a basic insight into the origin, historical development and importance of church folk chanting in Pag. The chants are analyzed through several levels: musical, cultural, historical and linguistic, but also through the aspects of change and different impacts. This kind of chanting is characterized by the symbiosis of church and folk music since it was derived from liturgical singing in the Old Slavonic and the Old Church Slavonic language – Croatian recension, and was formed lately in liturgical and paralitugical chanting in the archaic Croatian language adopting the features of local folklore tradition in the geographical area in which it was developed. This is the phenomenon of so-called folk worship. Church folk (glagolitic) chants were performed in Roman Catholic churches across the Adriatic coast, including the town of Pag. People used their national language and transmitted the chants from generation to generation by word of mouth. The existence of church folk chants is related to the centuries-old singing tradition in the church of Pag, and some of them are performed uninterruptedly. Nowadays, the chants have been saved by the Mixed Choir of the Assumption of the Blessed Virgin Mary from Pag.