Permanent displays in the Museum of the Cetinska Krajina Region – Sinj are archaeological and art. Stone monuments from different periods are on display in the lapidarium in the open and on the ground floor of the Museum. Some of the most notable exhibits include ancient monuments, represented by parts of architectural decoration, funerary monuments (stelae, votive altars dedicated to Roman deities) and figural sculptures, the most prominent of which are the statues of the Roman goddesses Roma and Fortuna from Čitluk, ancient Aequum. Precious stone monuments also include the 1st-century stelae from Ruduša, inscribed with Illyrian names and bearing specific decorative motifs. Of special significance is a pluteus, part of an altar partition, found at Gala, whose striking design and ornamental motifs in the form of closed concentric circles make it a unique example of Late Antique sculpture in the hinterland of Roman Dalmatia at the turn of the 6th and 7th centuries.
Archaeological artefacts on display are arranged in chronological order, from Prehistory through Antiquity to the Middle Ages, and are accompanied by readable texts, legends, maps, drawings and photographs providing an educational complement to the display.
Prehistory is represented by stone, pottery and bone archaeological finds. Of special significance are artefacts that make large part of the Collection and were found in the bed of the River Cetina, one of the most important archaeological sites in this part of Europe. The Palaeolithic is represented by a particularly notable stone hand wedge discovered in the bed of the River Cetina at Han, whereas the Neolithic finds include the fragments of pottery vessels and polished stone tools and weapons (polished wedge-shaped axes, bone hoes, flint knives, scrapers). The Eneolithic finds comprise copper wedge-shaped and stone axe hammers as well as the fragments of decorated pottery vessels from karst valleys in Otišić. Pottery vessels on display recovered from the pile dwelling at Dugiš near Otok also represent fine examples. In burial mounds (tumuli) were found pottery vessels, triangular daggers and one-cutting-edge knives that belong to a specific prehistoric cultural group called the Cetina Culture (the Eneolithic and the Bronze Age, 2250 BC – 1600 BC). The Late Bronze Age is represented by numerous examples of bronze weaponry (swords, knives, daggers, spears, axes), pottery and jewellery (necklaces, different bronze fibulae – arched and spiral fibulae, pendants and charms, clasps). The Iron Age finds include Greek-Illyrian helmets and greaves, iron spears and knives. The Antiquity period is represented by artefacts recovered from different sites in the Cetinska Krajina Region, and these include figuratively ornamented oil lamps, balsamaria, amphorae, clay roof tiles or tegulae bearing the workshop stamps and pottery vessels. The exhibits featuring prominently include finds from the bed of the River Cetina, such as iron weapons and tools of various types, a Roman military dagger, bronze amphora, strainer and a soldier's bowl with a handle called trulla. Two marble heads stand out for their dressing quality – the head of Empress Herennia Etruscilla, wife of Roman Emperor Trajan Decius, discovered at Sinj, and the head of a Roman goddess found at Čitluk. Late Antique jewellery from Gardun, Otok, Lučane and Rumin also represent significant finds. A selection of grave goods from the early Croatian graves (pottery vessels, iron sickles, knives, flints) discovered at Bajagić, Jasensko, Lučane and Jabuka have witnessed the Early Middle Ages. The Collection was subsequently enriched by the Middle Ages finds from the bed of the River Cetina, among which stand out an iron spear with winglets, iron battleaxes, spears, hoes and knives. The High Middle Ages is represented by grave goods, mostly bronze jewellery (rings and earrings from Gala, Glavice, Gardun, Bisko, Trilj) and numerous objects, notably examples of weaponry (swords, axes, spears, bows and arrows, knives, spurs).