Marcin Załuski (1700–1765) was an 18th-century
Roman Catholic
The Catholic Church (), also known as the Roman Catholic Church, is the largest Christian church, with 1.27 to 1.41 billion baptized Catholics worldwide as of 2025. It is among the world's oldest and largest international institut ...
Bishop
A bishop is an ordained member of the clergy who is entrusted with a position of Episcopal polity, authority and oversight in a religious institution. In Christianity, bishops are normally responsible for the governance and administration of di ...
of Płock and statesman, in Poland.
Early life
Marcin Zaluski was born November 15 or 30 April 1700 in Jedlance. He was born into the
Junosza noble family
Nobility is a social class found in many societies that have an aristocracy (class), aristocracy. It is normally appointed by and ranked immediately below Royal family, royalty. Nobility has often been an Estates of the realm, estate of the rea ...
, the son of
Alexander Joseph Zaluski and his wife Teresa Podkańskich.
His education began in
Jesuit
The Society of Jesus (; abbreviation: S.J. or SJ), also known as the Jesuit Order or the Jesuits ( ; ), is a religious order (Catholic), religious order of clerics regular of pontifical right for men in the Catholic Church headquartered in Rom ...
colleges in
Kalisz
Kalisz () is a city in central Poland, and the second-largest city in the Greater Poland Voivodeship, with 97,905 residents (December 2021). It is the capital city of the Kalisz Region. Situated on the Prosna river in the southeastern part of Gr ...
and
Braniewo
Braniewo () (, , Old Prussian language, Old Prussian: ''Brus''), is a town in northern Poland, in Warmia, in the Warmian-Masurian Voivodeship, with a population of 16,907 as of June 2021. It is the capital of Braniewo County.
Braniewo is the seco ...
. He studied in
Płock
Płock (pronounced ), officially the Ducal Capital City of Płock, is a city in central Poland, on the Vistula river, in the Masovian Voivodeship. According to the data provided by Central Statistical Office (Poland), GUS on 31 December 2021, the ...
with the help of his uncle
Louis Bartholomew Zaluski, and in
Slutsk
Slutsk is a town in Minsk Region, in central Belarus. It serves as the administrative center of Slutsk District, and is located on the Sluch (Belarus), Sluch River south of the capital Minsk. As of 2025, it has a population of 59,450.
Geography ...
(1717–1718). He also went to the
University of Vilnius
Vilnius University (Lithuanian language, Lithuanian: ''Vilniaus universitetas'') is a Public university, public research university, which is the first and largest university in Lithuania, as well as one of the oldest and most prominent higher e ...
(1718–1721) followed by Rome (1722–1723), where he studied
theology
Theology is the study of religious belief from a Religion, religious perspective, with a focus on the nature of divinity. It is taught as an Discipline (academia), academic discipline, typically in universities and seminaries. It occupies itse ...
and in
Florence
Florence ( ; ) is the capital city of the Italy, Italian region of Tuscany. It is also the most populated city in Tuscany, with 362,353 inhabitants, and 989,460 in Metropolitan City of Florence, its metropolitan province as of 2025.
Florence ...
, where he earned a
law degree
A law degree is an academic degree conferred for studies in law.
Some law degrees are professional degrees that are prerequisites or serve as preparation for legal careers. These generally include the Bachelor of Civil Law, Bachelor of Laws, an ...
.
Episcopal career
In 1715, he joined the
Jesuits
The Society of Jesus (; abbreviation: S.J. or SJ), also known as the Jesuit Order or the Jesuits ( ; ), is a religious order (Catholic), religious order of clerics regular of pontifical right for men in the Catholic Church headquartered in Rom ...
, took his first vows in 1717, but in 1723 he left the Jesuit order, probably under the influence of the family, who preferred that received the higher ecclesiastical dignity. From 1725 he was dean of the chapter of
Płock
Płock (pronounced ), officially the Ducal Capital City of Płock, is a city in central Poland, on the Vistula river, in the Masovian Voivodeship. According to the data provided by Central Statistical Office (Poland), GUS on 31 December 2021, the ...
, and in 1729 a canon of
Cracow on the 7 May 1732. This was due manly to support of his brother
Andrzej Stanislaw Zaluski, then Bishop of Płock.
On 13 Aug 1696 he was appointed
Auxiliary
Auxiliary may refer to:
In language
* Auxiliary language (disambiguation)
* Auxiliary verb
In military and law enforcement
* Auxiliary police
* Auxiliaries, civilians or quasi-military personnel who provide support of some kind to a military se ...
Bishop of Płock
A bishop is an ordained member of the clergy who is entrusted with a position of Episcopal polity, authority and oversight in a religious institution. In Christianity, bishops are normally responsible for the governance and administration of di ...
, by his close relative
Ludwik Bartłomiej Załuski. He was also appointed
Titular Bishop
A titular bishop in various churches is a bishop who is not in charge of a diocese.
By definition, a bishop is an "overseer" of a community of the faithful, so when a priest is ordained a bishop, the tradition of the Catholic, Eastern Orthodox an ...
of Rosmen. He was also an
abbot
Abbot is an ecclesiastical title given to the head of an independent monastery for men in various Western Christian traditions. The name is derived from ''abba'', the Aramaic form of the Hebrew ''ab'', and means "father". The female equivale ...
and
Secretary of the Crown.
In 1765 retired from his