He is best known as the author of two unfinished treatises. Description of Customs during the reign of August III (Opis obyczajów za panowania Augusta III, published in 1840) was an attempt to portray the culture of Poland during the first half of the 18th century. Memoires, or History of Poland (Pamiętniki, czyli Historia polska, published partially in 1840, complete edition in 1971) was a chronicle of the years 1743-1798, with special attention to the Confederation of Bar. Kitowicz's works, especially Opis obyczajów... have a significant literary and historical value, although he could not keep himself objective, speaking out against Stanisław August Poniatowski and the reformists. He died in Rzeczyca.