Since the Jagiellonian times (14th century), the Bialowieza Primeval Forest held a status of royal woodland, strictly protected as the monarchs' hunting ground. The last royal hunt in Bialowieza Forest took place in 1784, during Stanislaus Augustus Poniatowski's travel from Warsaw to Grodno. The paper gives a detailed account of the king's stay and hunts in the Bialowieza Primeval Forest, based on the analysis of 'Diary of His Majesty Polish King Stanislaus Augustus' travel to Seym in Grodno...', written by Adam Naruszewicz in 1784, and several cartographic documents: a list of places visited by king's retinue, maps of king's route (including the maps of the Bialowieza Primeval Forest) drawn by Michal Polchowski, and a drawing of a hunting bower raised in the Forest for the purposes of Stanislaus Augustus' hunt. Furthermore, the history of material traces of the visit (hunting enclosures and bowers, roads, maps) is described and the reports in the Russian literature and art are presented.