Justiniana Prima
Justiniana Prima is usually identified with Caričin Grad, a fortified sixth-century city in southern Serbia. Emperor Justinian I founded the city near the region associated with his birthplace, during a programme of rebuilding and reorganisation across the Balkans. Its ruins lie on the slopes of Mount Radan, away from the main modern roads.
The city had an unusually short life. It was built with the ambition of a regional administrative and religious centre, then abandoned around 615 CE during the invasions and instability that affected the Balkans. The remains preserve a city designed for authority before ordinary use had time to wear it down.
A new city for a changing empire
Justiniana Prima belonged to the eastern Roman, or Byzantine, world. Justinian's government repaired old fortresses and founded new centres as it tried to secure the provinces. A new city could provide an episcopal seat, administrative offices, military protection, and a visible sign of imperial control.
Caričin Grad was built on a stepped plateau at the meeting of two rivers. The position offered defensible ground and access to water, although it was not located on one of the major routes that carried the main traffic through the Balkans. The choice suggests that political and regional considerations mattered alongside commercial convenience.
The excavated city covers about nine hectares within its walls. It is divided into three principal areas: the Acropolis, the Upper Town, and the Lower Town. Streets, porticoes, public buildings, houses, churches, and water installations connected the parts of the settlement.
The Acropolis and the churches
The Acropolis was the first-built and most formal part of the city. It contained a large episcopal basilica, a baptistery, the bishop's residence, and other buildings connected with the administration of the church. The complex made Justiniana Prima a religious centre as well as a fortified town.
Several other basilicas have been identified across the site. Their plans, mosaics, and architectural decoration show how much energy went into building Christian institutions in a city that had only recently been founded. The churches were not added as an afterthought. They helped define the city's public identity.
The number of churches has sometimes encouraged grand descriptions of the city. The ruins support the importance of the episcopal centre, but they do not tell us how many people attended each building or how often every church was used. A basilica gives us architecture and organisation. It does not provide a complete attendance record.
Water, streets, and daily life
An aqueduct brought water to the city from a source roughly sixteen kilometres away. Pools, baths, and fountains depended on that supply. Building an aqueduct over the hills required surveying, labour, maintenance, and political authority. The water system is one of the clearest signs that the city was planned as a permanent centre.
Porticoed streets connected the three urban areas. Shops and houses opened onto routes that were also used for official movement and religious processions. The paving is incomplete, but the plan allows archaeologists to reconstruct how residents, soldiers, officials, and visitors moved through the city.
Finds from the houses include pottery, tools, metal objects, and other signs of domestic work. Archaeobotanical and animal-bone studies add information about food, farming, transport, and the animals used in construction. These details bring the city down from imperial policy to meals, repairs, and work.
A city that did not last
Justiniana Prima was occupied for less than a century. Around 615 CE, Avar and Slavic incursions contributed to the city's abandonment. The exact sequence is not known in every detail. Fire, attacks, the interruption of the aqueduct, and the wider collapse of Byzantine control have all been considered in discussions of the end of the settlement.
Its short history is an advantage for archaeology. Buildings and objects can often be placed within a relatively narrow period, while later rebuilding was limited. At the same time, the abandoned city does not represent one frozen day. Repairs, additions, and changes took place before the final retreat.
Rediscovering Caričin Grad
The first excavations began in 1912, and research has continued through Serbian and international cooperation. Since 1978, the Institute of Archaeology in Belgrade and the École française de Rome have worked with other partners on the site. LiDAR, geophysical survey, and other methods have expanded the known city beyond the buildings first exposed.
Caričin Grad is sometimes presented as a lost imperial capital. The phrase captures its ambition but not its entire history. It was a new city that received walls, churches, water, and administrative buildings, then lost its population before the plan could mature into a long-lived urban tradition.
The stones remain on the plateau because the city ended early. The unanswered question is not whether Justinian intended it to matter. The buildings make that clear. It is how a carefully planned centre felt to the people who had to live there, maintain it, and leave when the roads around it became unsafe.