Top 10 Ancient Ruins in Croatia
Croatia's Adriatic coastline and its Dalmatian hinterland were among the most thoroughly Romanized parts of the ancient world. The province of Dalmatia, organized in the early 1st century AD, was the birthplace of the emperor Diocletian and later the site of his extraordinary retirement palace. But the region's history extends well beyond Rome: the Illyrian tribes who preceded Roman conquest left hill forts and burial tumuli across the interior, and the Greek cities of the Adriatic coast — including Issa on the island of Vis, founded from Syracuse in the 4th century BC — added another cultural layer. The city of Salona near modern Split was one of the major urban centres of the late Roman Balkans, and its ruins sprawl across a remarkable extent of suburban farmland. Open the map to navigate Croatia's archaeological landscape.
1. Diocletian's Palace, Split
Diocletian's Palace in Split is one of the most remarkable survivals of Roman architecture anywhere in the world — not primarily because it is a ruin, but because it is not. When Diocletian retired here in 305 AD after abdicating the imperial throne he had held since 284 AD, he built a combined palace and fortress covering roughly 3 hectares on the Adriatic shore. After the fall of Salona in the 7th century AD, refugees moved inside the palace walls and began converting its halls, mausoleum, and temples into homes, churches, and streets. That process has continued for fourteen centuries. Today, around 3,000 people still live within the palace walls, their apartments built directly into and over the original Roman structures. The mausoleum became Split Cathedral; a temple of Jupiter became a baptistery. Walking the old town reveals Roman walls, columns, and vaults at every turn. UNESCO World Heritage Site.
2. Salona, near Split
Salona was the capital of the Roman province of Dalmatia and at its height in the 2nd–3rd centuries AD was one of the largest cities in the western Balkans, with a population perhaps approaching 60,000. The site, now partially within the suburbs of Solin on the outskirts of Split, preserves remains spread across a large area: defensive walls with towers, an amphitheatre, a theatre, Christian cemeteries and basilicas from the late Roman period, bath complexes, and remains of the forum. The early Christian heritage of Salona is exceptional — the city produced several important martyrs and bishops and was a centre of early Christianity in Illyricum. The site is partly free and walkable; the Tusculum area has a small museum.
3. Pula Arena, Istria
The amphitheatre at Pula is one of the six largest Roman amphitheatres ever built and the best preserved outside Italy. Constructed in the 1st century AD, probably during the reign of Augustus or Claudius, it could seat roughly 20,000 spectators. Unlike the Colosseum in Rome, which lost most of its outer wall to stone quarrying in the medieval period, Pula's arena retains its full outer elevation on three sides, including two of the four original towers. The underground passages beneath the arena floor, where animals and gladiators were held before combat, are accessible. The arena now hosts summer concerts and film screenings and is in active use as an outdoor venue.
4. Narona, near Metković
Narona, in the lower Neretva valley near the town of Vid, was the principal city of the southern Dalmatian interior and a major trading post linking the Adriatic with the Balkans. The site's most remarkable discovery was made in 1995 when a cache of imperial statues was found in the ruins of an Augusteum — a temple dedicated to the imperial cult — including a headless statue of Augustus, figures of other emperors and members of the imperial family, and fragments of cult equipment. The statues had been systematically decapitated and buried, probably in the late 4th century AD. The Narona Archaeological Museum, built directly over the excavated Augusteum, allows visitors to walk among the statues in situ.
5. Zadar Roman Forum
Zadar's historic peninsula preserves one of the most complete Roman city plans in Croatia, with its forum still serving as the central public space — now called the Forum Square — around which the modern city has organized itself. The forum was built during the 1st century AD and covered an area of roughly 90 by 45 metres, surrounded on three sides by porticoes. The Temple of Jupiter (later transformed into St. Donatus, the pre-Romanesque round church that is Zadar's architectural symbol) occupies the northern end of the forum. A column of shame from the Roman period still stands in the square. The original paving stones of the forum are partially preserved underfoot.
6. Asseria, Benkovac Area
Asseria was an Illyrian and later Roman city in the Dalmatian hinterland near modern Benkovac. First occupied by the Liburnian Illyrian tribe, it became a Roman municipium in the 1st century AD and preserves impressive city walls with towers, as well as funerary monuments of unusual character — a row of rectangular 'arch tombs' built into the city wall that are a distinctive feature of Dalmatian Roman funerary architecture. The site is not heavily visited and retains a raw, partially excavated quality that contrasts with the more polished presentation of coastal sites.
7. Epidaurum, Cavtat
Epidaurum, near modern Cavtat south of Dubrovnik, was a Greek and later Roman city that served as the predecessor of Ragusa (Dubrovnik). The settlement was founded by Greek colonists from Issa in the 4th century BC and became a prosperous Roman municipium. When the city was sacked in the 7th century AD, its population fled north and founded the new settlement that became Dubrovnik. Roman remains at Cavtat include inscriptions, the foundations of forum buildings, and fragments of walls and cisterns scattered through the modern town and its surrounding fields.
8. Burnum, Krka National Park
Burnum, within what is now Krka National Park above the Krka River canyon, was a Roman legionary fortress established in the 1st century AD as a base for the conquest and pacification of Illyricum. Legions VII and XI were stationed here at various times. The site's most visible feature is a pair of arched gateway piers from the Principia (headquarters building) that still stand to several metres height above the plateau. The Burnum Archaeological Museum, based in the village of Ivoševci, displays finds from the site and explains the military history of Roman Dalmatia. The dramatic canyon setting of the nearby Krka waterfalls adds considerable appeal to a visit.
9. Issa, Island of Vis
Issa, on the island of Vis, was one of the earliest Greek colonies in the Adriatic, founded around 397 BC by colonists from Syracuse. The city prospered through trade and established sub-colonies at Tragurion (Trogir) and Epetion (Stobreč). Issa's remains are distributed around the modern town of Vis, and archaeological parks at several points on the island preserve Greek and Roman walls, a Hellenistic cemetery with tower tombs, a Roman bath complex, and finds that include some of the finest Hellenistic sculpture found in Croatia. The island museum in the town of Vis houses an excellent collection from the site.
10. Nin, Northern Dalmatia
Nin (ancient Aenona) occupies a small island connected by a causeway to the Dalmatian mainland near Zadar and preserves Croatia's smallest cathedral alongside the foundations of a Roman temple dedicated to Augustus (or possibly Liber) dating from the 1st century AD. The temple, a prostyle structure with four columns, stands in the centre of the old town and is one of the best-preserved Roman temples in Croatia despite its modest scale. Nin was an important Liburnian Illyrian settlement before Roman conquest and later a centre of early Croatian medieval culture, and its multiple archaeological layers reward a careful visit.
Croatia's Adriatic sites are accessible and well-organized for tourism. Diocletian's Palace and the Pula Arena are open year-round; the Salona site is freely walkable but best visited between April and October. The summer months (June–August) bring very large crowds to Split and Pula; spring and autumn offer more comfortable conditions for archaeological exploration. Admission fees apply at most sites. Use Open the map to plan routes along the Dalmatian coast and into the hinterland.