Don Petar Vrankić studied philosophy and theology in Split. He continued his studies in Italy (Urbaniana, Lateran, Gregoriana) and Europe (Rome, Paris, London, Chicago etc.). In 1980, he obtained PhD in Church history. Vrankić taught history, ecumenical theology in Sarajevo, Augsburg, Rome etc. From 1981 to 1985 he was vice-dean at Vrhbosnensia Catholic School of Theology in Sarajevo. He speaks classical and modern languages and is member of numerous organizations, institutions and foundations. At Bijeljina conference he will speak on the subject: Theology of Priesthood in St. John Chrysostom's Teaching and Its Reception in the Western Church.