Register of the Sumy regiment of 1664

The 1664 register of the Sumy Cossack regiment, compiled with the participation of voivode Kuzma Polyanskyi and Ivan Chudynov, contains detailed lists of Cossacks, burghers, gunsmiths and blacksmiths with their families. The document also includes descriptions of the fortifications of the regimental city, armories and fortifications. The register is a valuable source for studying the economic and military status of the regiment, as well as for researching family ties and the social structure of the population. Particular attention is drawn to the list of mills and their owners, which is important for the study of the economy of the region.