 After his education in Zadar and Rome, he became a canon and the prefect of the Church of St. John near the port in Zadar.Pope Julius II named him bishop of Modruš in 1509 in a time of uncertainty in Croatia after the Croatian loss to the Ottoman Empire in the Battle of Krbava Field of 1493.Kožičić wrote the well-known work "Psaltir" which was a small prayerbook which contained some basic Christian prayers, as well as some psalms and other songs for prayer and for use in mass.