In this article, I have focused on eight prose letters in “Zabawy Przyjemne i Pożyteczne”. The first two are by Franciszek Bieńkowski and concern the issue of good education – good treatment for people with lower social status. The next four letters are the correspondence of three great figures of the Renaissance: the Polish king Stefan Batory, his secretary and statesman Jan Zamoyski and the distinguished Italian humanist Antoni Muret. These letters, coming from the 16th century and written in Latin, were translated by Józef Koblański in the 70s of the 18th century. The texts are examples of traditional epistolary art based on ancient principles. The seventh letter of unknown authorship compliments the reforms of the National Education C...