The Archaeological Museum of Argos Orestiko hosts findings from the central part of ancient Orestida dating from the time of Homer to Emperor Diocletian. The exhibits come from traces and traditions of ordinary residents or teachers, as well as from recent excavations throughout the prefecture of Kastoria, the central part of ancient Orestida.Its exhibition sections include elaborate jewels accompanied by ritual objects, horns, ceramic vessels, as well as rich artwork, statuettes and inscribed monuments. The important exhibits include a unique phalanxian shield of the pedestrian infantry, as well as the Battanyan resolution, the most important inscription with political content from Western Macedonia.

The permanent exhibition follows the political and cultural transformations of the central part of Orestida in four consecutive sections, following an introduction to the geographical area and the way the museum was created.

In the first section (1100-550 BC) There is an impressive set of brass jewelery and ritual objects, horn spikes, ceramic utensils, as well as representations of male feminine and child burial.

The second section (The kingdom of Orestius, 550-359 BC) begins with an archaic figurine statue and includes early inscribed monuments, a marble sphinx and a tombstone section, as well as funerary graffiti from classical times. From 359 to 200 BC Orestida was part of the kingdom of Macedonia and the Orestoi joined the Macedonian phalanx.In this section there are exposed a sharisse peak and a unique phalantic shield of the pedestrian infantry, as well as inscribed monuments.

In the last section are presented antiquities dating from the supplication of the Orestas to the Romans, in 200 BC, until the founding of Diocletian, In 300 AD. The region largely retains its administrative autonomy, as evidenced by the survival of the Commonwealth of Hosts as a local political union, as well as the Battle of Washington, the most important inscription with political content from Western Macedonia.The cultural and religious identity of the Orestes is also largely preserved in the tributes to the gods and the tombs of the ordinary citizens or the infamous dead, who impress with the variety of their forms.