Since its inception, the Church has paid great attention to the intellectual formation of the clergy. After the reception of the Sacrament of Holy Orders, for the pastoral and intellectual formation of the clergy of the Diocese of Tarnów between 1918 and 1939, theological examinations were of vital importance and they were carried out in accordance with the dispositions of the universal legislator contained in the 1917 Code of Canon Law in Canon 130. In the period under discussion, examinations for vicars were held in August in the auditorium of the Theological Seminary in Tarnów. The examination material included dogmatic theology, moral theology, pastoral theology and canon law. This study is a contribution to the history of canon law, as the development of the institution of examinations for vicars in the Diocese of Tarnów between 1918 and 1939 has not yet been studied.