He was born 15 January 1499 and ordained a priest in 1530. He began his career in 1518 as a notary public of King Sigismund I the Old. In 1522, he went to study philosophy and rhetoric in Padua and then continued his studies in Bologna. After being ordained in 1530, became canon of Kraków.
As Bishop of Kraków, he was concerned with the level of education of the clergy, was a supporter of a soft approach with dissenters. In 1546, he ordered an inspection visit of the diocese, which in concept at least, was to limit the influence of the Reformation, but due to the mildness of his character was largely ineffectual.
He gathered around him scholars and poets such that the atmosphere of the cathedral was one of vigorous scientific and literary debate.
- Bishop Samuel Maciejowski at catholic-hierarchy.
- Boleslaw Przybyszewski: Brief outline of the history of the Diocese of Kraków, Volume II, Cracow 1993
- Urzędnicy centralni i nadworni Polski XIV-XVIII wieku, Kórnik 1992, p.145.
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