Adam Stanisław Naruszewicz (; 20 October 1733 – 8 July 1796) was a Polish-Lithuanian nobleman, poet, historian, dramatist, translator, publicist, Jesuit and Roman Catholic bishop.
Born in a szlachta family, he went on to become a close advisor to the Polish king Stanisław August Poniatowski, a titular bishop of Smolensk (1775–1790), bishop of Łuck (1790–1796), and a member of the government of the Polish-Lithuanian Commonwealth through his seat in the Permanent Council (1781–1786).
He has been described as one of the most significant writers of the Polish Enlightenment. In his early years he wrote poems and dramas, before focusing on historical research and becoming one of the first modern Polish historians. An author of the seven volumes of Historia narodu polskiego (History of the Polish Nation), a highly influential work on the early Polish historiography, he is responsible for popularizing the term "Piast dynasty" for describing the first dynasty of Poland.
Life
thumb|upright|[[Wadwicz coat of arms, used by Naruszewicz]]
The Naruszewicz family belonged to the middle class szlachta (Polish-Lithuanian nobility) who held local government offices and had a small estate in Polesie region of the Polish–Lithuanian Commonwealth, where Adam Naruszewicz likely was born. He started his education in a Jesuit school in Pinsk. Naruszewicz joined the Jesuit Order on 14 August 1748, and shortly afterward he began studying and from 1753 lecturing in grammar at the Vilnius University. He acted as the "king's whip" in the Senate, although he did not play a major role in the parliamentary debates, acting mostly as a writer and organizer. and by Barbara Wolska as "one of the most significant poets of the Polish Enlightenment", and the most significant poet associated with the Poniatowski's political faction. In particular, he was also the first modern historian who used the term Piast dynasty for describing the first dynasty of Poland, popularizing it in the subsequent historiography. According to Platt, he was the most significant Polish historian until Joachim Lelewel. In Polish historiography, there is a distinction between the "Naruszewicz school", supporting monarchy and strong central power, and the more liberal-republican "Lelewel school".