He was born on 8 November 1717 in Małopolska (Little Poland). He received his education at the Jesuit college in Košice and then completed his theological studies in Poznań. Starting from 1751, he was a diocesan missionary, which is why he stayed, among others, in Poznań, Sambor and Przemyśl. He was considered to be an outstanding preacher, and his fame was enhanced thanks to a popular prayer book he authored: Początki życia niebieskiego na ziemi i przez złączenie się z Bogiem i świętami Jego, na każdy dzień w tygodniu sposobem na misyi S. J. zwyczajnym rozłożone (first edition 1772, followed by numerous subsequent editions). In 1771, he became the rector of the Jesuit college in Przemyśl. After the dissolution of the Jesuit Order (1773), he became a parish priest in Lisko. He died in Krosno before 2 July 1783. Majchrowicz’s most important political and historical work was Trwałość szczęśliwa królestw albo ich smutny upadek, wolnym narodom na oczy stawiona na utrzymanie nieoszacowanej szczęśliwości swojej, written during his stay in Przemyśl and issued in Lviv in 1764 (the second edition, with corrected errors and curious facts about the ancient history of the world added, was issued in Kalisz in 1783). Majchrowicz remained critical about the reformist ideas that gained currency in the mid-eighteenth century, finding the most significant expression in Stanisław Konarski’s treatise O skutecznym rad sposobie. As a result, Władysław Smoleński described Majchrowicz as ‘the Polish Bossuet’, which was not a compliment in the view of this liberal scholar. In turn, Władysław Konopczyński presented Trwałość… in his volume on Polish political writers of the 18th century as ‘a lecture on faith and a textbook of moral theology, supported by historical evidence, and an authoritative source for the extreme faction of conservative Catholics.’