Roman Catholic Diocese of Telšiai Tags: Clerical Administrative Region, Diocese.The Roman Catholic Diocese of Telšiai (Latin: Telsen(sis)) is an diocese located in the city of Telšiai in the Ecclesiastical province of Kaunas in Lithuania. It was established on April 4 1926 from the Diocese of Samogitia. thumbnail point area (km2) 1.3373e+10 country Lithuania jurisdiction Diocese latitude 55.9833 longitude 22.25 Learn more... Loading...