Invasion of Slavs and Avars became more intensive during the 6th and 7th and their stay on Byzantine territory became more lasting. Having in mind that historical sources bring only a few sketches on our territories in this period, while the material traces are still not revealed, one can only suppose that final settling was not occured before the beginning of 7th century. The oldest traces of Serbs on this territory derives from the site of Kuline under the mountain of Kablar. Decorated ceramic ware, a small number of everyday items without any architecture preserved, point out that this hidden position, above the West Morava river, was used as a settlement during the period of 10th-11th century.
The display dedicated to the later phases of the Middle Ages bring the objects illustrating an everyday life and spiritual culture of the medieval serbian inhabitants. Exposed jewelery from necropolises on Roman baths and from Mrčajevci, as well as coin hoards from Zablaće and Koštunići testify on decorating patterns, i.e. economic possibiities of this population. On the other side, the offensive (swards, macehead) and defansive (chainmail armor) weapons is closely illustrate the mediaveal way of warfare. Economical activities on exploitation and ore processing on the mountain of Rudnik are presented by characteristic metal tools.