Dmochowski was born in Zabolotye in 1779. He attended a
Piarist secondary school at
Luzkhi from when was 10 until he obtained his
matura on 1 November 1797, after which he began attending the diocesan seminary at
Krāslava; he transferred to the diocesan seminary at
Vilnius in 1798. He was ordained a priest on at Vilnius. After his ordination, he served as a chaplain to
Jan Nepomucen Kossakowski and
Hieronim Stroynowski. He was appointed canon of Courland in 1807. Later, Dmochowski was appointed coadjutor cantor of the cathedral chapter of Vilnius on 26 February 1811; he was appointed canon regular on 10 December 1812. He was appointed assessor of the consistory of the Diocese of Vilnius in 1813. In 1814, Dmochowski was appointed deputy of the ecclesiastical court at Vilnius and member of its cathedral council. He was awarded a
doctorate in theology from the on 29 July 1818. Dmochowski later served at the from 1821 to 1823, when he was appointed dean of the cathedral chapter at Vilnius. He was appointed auxiliary bishop of the Diocese of Vilnius by
Nicholas I of Russia on 31 March 1838; his appointment was confirmed by
Pope Gregory XVI on 17 December 1840, and he was consecrated as auxiliary bishop of Vilnius and titular bishop of
Meloë on 29 June 1841 at the
Church of St. Catherine in Saint Petersburg by
Ignacy Ludwik Pawłowski. He was appointed head of the Roman Catholic Ecclesiastical College in 1842. On 3 July 1848, Dmochowski was appointed by
Pope Pius IX as archbishop of the
Archdiocese of Mohilev. He received his
pallium at the Church of St. Catherine on 28 November 1848, and ceremonially assumed control of the Archdiocese at
Mohilev Cathedral on 17 July 1849. As archbishop of Mohilev, Dmochowski opposed the closure of Catholic monasteries and
Greek Catholic parishes in the Russian Empire. He also helped to construct a cemetery in
Vyborgsky District. Dmochowski died in 1851 in
Saint Petersburg and was buried in the Lutheran cemetery in Vyborgsky; his remains were moved to a Catholic cemetery in the same district in 1901. ==References==