The oldest military fortification in the region of the Timok River called Timacum Minus (lat. Timacum - the Timok, hydronym; lat. minus - “smaller”) was built in the Beli Timok valley in the vicinity of village Ravna, not far from Knjazevac.
The ethnological department is presented in part of the exhibition of the Native Museum, as well as in the house (proclaimed cultural monument) of Aleksa Ace Stanojević, with the interior exhibition "Knjaževac at the end of the 19th and the beginning of the 20th century".
The archaeological collection contains over 2000 artifacts, found during 45 years of excavations in the municipality of Knjaževac. It contains a large number of significant and rare findings, as well as numerous objects typical of the Prehistoric, Antique or Middle Age periods.
Art department of the Homeland museum of Knjaževac takes care about visual and applied art collections (paintings, drawings, graphics, icons etc). It also carries out the organization and realization of exhibitions and other programs in the Museum, in collaboration with the Department for education and public relations.