Top 10 Archaeological Sites in Croatia
Croatia's Adriatic coast and its Dalmatian interior have been inhabited and heavily influenced by successive Mediterranean civilisations — Illyrian, Greek, Roman, Byzantine, Venetian — and the archaeological record reflects this layered heritage in sites of outstanding quality and variety. The country has six UNESCO World Heritage Sites with significant archaeological components, and its coastal cities preserve Roman and early medieval monuments in a density that few European countries can match.
1. Diocletian's Palace, Split
Built by the Roman emperor Diocletian between approximately 295 and 305 CE as his retirement residence, Diocletian's Palace at Split is one of the most remarkable Roman monuments in existence because the town of Split has grown up within its walls. The palace was built on a castrum (military camp) plan, 215 by 175 metres, with four gates, towers, a peristyle, imperial apartments, a mausoleum (now the Cathedral of Saint Domnius), and a Temple of Jupiter (now a baptistery). The underground substructure (cellars) preserves the plan of the imperial apartments in mirror image and is open to visitors. The palace walls still stand to considerable height and the street plan of the medieval and modern city follows Roman lines. A UNESCO World Heritage Site; the old town is fully accessible and free.
2. Pula Amphitheatre, Pula
The Roman amphitheatre at Pula (ancient Pola) is the sixth largest surviving Roman amphitheatre in the world, built in the late first century BCE or early first century CE, capable of seating approximately 23,000 spectators. Unlike most amphitheatres, it is almost completely preserved on the exterior — three of its four external facades survive to full height — because the Venetians, who controlled the city from 1331, specifically forbade the robbing of its stone. The interior arena and cavea are less well preserved. The amphitheatre is used for summer concerts and events; a small underground museum displays Roman vessels and associated finds. Accessible from Pula town centre.
3. Euphrasian Basilica, Poreč
The Episcopal Complex of the Euphrasian Basilica in Poreč (ancient Parentium), dating to the sixth century CE, contains the finest surviving mosaic ensemble in Croatia and one of the most important in the Byzantine world outside Ravenna. Bishop Euphrasius rebuilt the cathedral between approximately 543 and 554 CE; the apse mosaics — the Theotokos (Virgin and Child) enthroned with archangels, flanked by martyrs and the donor portrait of Euphrasius himself — are among the best-preserved examples of early Byzantine art. The complex includes a pre-Euphrasian mosaic pavement preserved in situ from the fourth-century CE phase. A UNESCO World Heritage Site; open year-round in Poreč town centre.
4. Salona (Solin), near Split
Salona, the former provincial capital of Roman Dalmatia, lies 5 km north-east of Split. At its peak, it may have been one of the largest cities in the western Roman empire, with a population of 60,000 or more. The site preserves an amphitheatre, theatres, temples, a forum, and extensive early Christian monuments including the Manastirine necropolis with some of the earliest Christian tombstones in the Adriatic region. Salona was the birthplace of the emperor Diocletian and was destroyed by Avar and Slav incursions in the early seventh century; its population moved to the safety of Diocletian's Palace, which became the nucleus of modern Split. The site is accessible from Solin; an excellent site museum is open year-round.
5. Zadar Roman Forum
The Roman forum of Zadar (ancient Iadera), occupying the central urban block of the old town peninsula, is the largest Roman forum on the eastern Adriatic. Built in the first century BCE through the first century CE, its preserved elements include a large temple podium (now partly incorporated into the Church of St Donatus, an unusual ninth-century circular church), column bases, inscriptions, and paving. The medieval and early modern city was built around and on top of the forum, making Zadar's old town a palimpsest of Roman, early Christian, medieval, and Venetian remains. The archaeological museum adjacent to the forum has an excellent collection.
6. Nin (Aenona)
Nin, on a small island connected to the mainland by two bridges, preserves the most complete small Roman town in Croatia, including the Temple of Diana (unusually well preserved to floor level) and the earliest Croatian church — the Church of the Holy Cross, a pre-Romanesque structure dated to around the ninth century CE so small (interior 10 sq m) that it is sometimes called the world's smallest cathedral. Nin was the seat of the early Croatian princes before the court moved to Biograd and then Split. The archaeological museum in Nin displays Roman and medieval finds from the site.
7. Andautonia (Šcitarjevo)
The Roman municipium of Andautonia near Zagreb is the most extensively excavated Roman site in northern Croatia. Systematic excavation since the nineteenth century has revealed the forum, basilica, baths, and residential quarters of a Pannonian provincial town. The site is a scheduled monument with an archaeological park in progress. Finds from the excavations are in the Zagreb Archaeological Museum, which has the most complete collection of Roman material from inland Croatia, including the remarkable Vašica treasure of late Roman silver.
8. Cibalae (Vinkovci)
Vinkovci, one of the longest continuously inhabited towns in Europe (settled since at least 6000 BCE), was the Roman city of Cibalae, best known as the birthplace of two Roman emperors, Valentinian I and Valens (brothers, co-emperors 364–375 CE). Archaeological investigation beneath the modern town has found Neolithic (Starčevo culture), Bronze Age, Iron Age (Hallstatt and La Tène), Roman, and medieval layers in succession. A prehistoric settlement sequence of this depth is exceptional in Croatia. The town museum has displays covering all periods.
9. Klis Fortress
The fortress of Klis above the Klis gap, the strategic pass through the Dalmatian hinterland, has been occupied from the pre-Roman Illyrian period through Roman, Byzantine, Croatian, medieval, and Ottoman phases. The Illyrian hillfort on the summit was the capital of the Delmatae tribe; the Roman castellum replaced it; the medieval Croatian fort served as the seat of Croatian princes. The extensive Venetian and Ottoman-period fortifications are the most visible today. The site is accessible from Split; the views over the Kaštela Bay from the fortress walls justify the visit independently of the archaeological interest.
10. Vela Spila Cave, Korcula
Vela Spila cave on the island of Korcula preserves one of the most complete prehistoric sequences in the eastern Adriatic, with continuous occupation from the Upper Palaeolithic (c. 19,000 years ago) through the Mesolithic, Neolithic, Copper Age, and Bronze Age. A 2010 excavation found the oldest known ceramic vessels in the Mediterranean (dated to c. 17,500 BCE) in the cave, predating the arrival of farming and challenging the standard assumption that pottery was introduced to Europe only with the Neolithic. The cave is accessible on foot from Vela Luka on the island of Korcula, which is served by ferry from Split and Dubrovnik.