|Greek Catholic Diocese of Oradea Mare|
|Church||Romanian Greek Catholic Church|
|Appointed||25 March 1807|
|Term ended||25 December 1839|
|Consecration||7 July 1807 (Bishop)
by Ioan Bob
|Born||1 August 1758
|Died||25 December 1839
Vulcan was born on 1 August 1758 in Veza, a former village which has since been incorporated into Blaj town. He was ordained priest in 1784 and attended the Greek-Catholic college of Saint Barabara in Vienna. Later he moved to Lviv where he became vice-rector of the seminary.
On 25 October 1806 he was designated Greek Catholic bishop of Oradea the Austrian government and so confirmed by the Vatican on 25 March 1807. Accordingly, on 7 July 1807 he consecrated Bishop by the bishop of Făgăraş, Ioan Bob in the Cathedral of Blaj.
During his reign the diocese of Oradea enjoyed an increase in the number of parishes and faithfuls, passing from 26,232 parishioners to 153,163 souls. He tried to ensure a regular wage to his priests, and he focused on the instruction, founding many schools.
Vulcan was a supporter of Romanian culture and literature. He pleaded the Hasburg monarchy in order to have appointed a Romanian bishop in place of a Serbian bishop for the Orthodox diocese of Arad.
Vulcan died in Oradea on 25 December 1839.
- or in October 1760 according to Ritzler
- Ritzler, Remigius (1968). "Magno-Varadiensis". Hierarchia catholica Medii aevi sive summorum pontificum, S.R.E. cardinalium, ecclesiarum antistitum series. 7. Padua. p. 249.
- "Bishop Samuel Vulcan". Catholic-Hierarchy.org. David M. Cheney. Retrieved 23 January 2015.
- "Samuil Vulcan". Episcopia Greco-Catolică Oradea. Retrieved 7 April 2011.
- "Episcopul greco-catolic Samuil Vulcan - 250 de ani de la naștere". greco-catolica.org. Retrieved 7 April 2011.
- Colegiul Național „Samuil Vulcan” din Beiuș