The museum collection begins with works of prehistoric art from the 1st–4th centuries BC.

Its holdings amount to over 5,000 items, of which only a small number are on permanent display, including the Pljevlja diatreta or cage cup.

The Pljevlja diatreta is a well-preserved cage cup[1] from the 4th century AD.

It is made of transparent colourless glass with a cobalt blue web.

The cup is not on display, but can be looked at a scheduled appointment with the museum administration.