| Honorific-Prefix: | Most Reverend |
| Stefan Antoni Mdzewski | |
| Auxiliary Bishop of Gniezno Titular Bishop of Calama | |
| Church: | Catholic Church |
| Archdiocese: | Archdiocese of Gniezno |
| Term: | 1699–1718 |
| Ordination: | 2 May 1671 |
| Consecration: | 12 Mar 1690 |
| Consecrated By: | Bogusław Leszczyński (bishop) |
| Birth Date: | 1653 |
| Birth Place: | Plock |
| Death Date: | 16 May 1718 (age 65) |
| Death Place: | Gniezno, Poland |
| Previous Post: | Auxiliary Bishop of Lutsk (1690–1699) |
Stefan Antoni Mdzewski, O.P. (1653–1718) was a Roman Catholic prelate who served as Auxiliary Bishop of Gniezno (1699–1718) and Auxiliary Bishop of Lutsk (1690-1699).[1] [2] [3]
Stefan Antoni Mdzewski was born in Plock in 1653 and ordained a priest in the Order of Preachers on 2 May 1671. On 11 Jan 1690, he was appointed during the papacy of Pope Alexander VIII as Auxiliary Bishop of Lutsk and Titular Bishop of Calama. On 12 Mar 1690, he was consecrated bishop by Bogusław Leszczyński (bishop), Bishop of Lutsk, with Andrzej Chryzostom Załuski, Bishop of Kyiv and Chernihiv, serving as co-consecrator. On 13 Aug 1699, he was appointed during the papacy of Pope Innocent XII as Auxiliary Bishop of Gniezno. He served as Auxiliary Bishop of Gniezno until his death on 16 May 1718.
While bishop, he was the principal co-consecrator of: