Archive of Kosh Zaporizhzhya Sich is a unique, extremely valuable historical source, a real pearl of Ukrainian writing of the 18th century; it comprehensively and comprehensively reflected the last forty-year period of the existence of the Zaporizhzhya Cossacks. The documents cover the life of Zaporozhye in all its manifestations: economic, social and legal activities, culture, life, international relations, as well as administrative measures of the Zaporizhzhya government.