Piotr Parczewski

He continued his studies at the Vilnius University where he received the master's degree in philosophy in 1622.

Later, Parczewski earned a doctorate in theology and was ordained to the priesthood in 1628, became rector in Starodub.

In 1635, King Wladyslaw IV Vasa appointed him as the first bishop of Smolensk, and then Parczewski went to Rome to obtain the approval of the new diocese, which was received on September 1, 1636.

On September 7 of the same year, he was ordained a bishop by Cardinal Giovanni Battista Pamphili (future Pope Innocent X).

During the Swedish Deluge, on 18 August 1655, he signed the Treaty of Kėdainiai, an instrument of surrender to Charles X Gustav of Sweden.