Justiniana Prima (Latin: , , ) was an Eastern Roman city that existed from 535 to 615, and currently an archaeological site, known as or Caričin Grad (), near modern Lebane in the Leskovac region, southern Serbia. It was founded by Emperor Justinian I (527-565) and served as the metropolitan seat of the then newly founded Archbishopric of Justiniana Prima, which became the main church administrative body of the central and western Balkans with jurisdiction from Praevalitana to Dacia Ripensis Justinian Prima was originally designed to become the capital of the prefecture of Illyricum, but for reasons likely related with its status near the Roman frontiers of the 6th century CE, Thessaloniki was preferred. It was abandoned less than 100 years after its foundation. In 1979, the archaeological site of Justiniana Prima (Caričin Grad) was added to the Archaeological Sites of Exceptional Importance-list under official protected status by the Republic of Serbia. History The city was founded by Emperor Justinian I in 535. It existed until 615 and was designed as the seat of the Archbishopric of Justiniana Prima. The arch-priest of the Illyrians ('Ιλλυριών άρχιερεύς) seated in Justinian Prima had jurisdiction over Dacia Ripensis, Dacia Mediterranea, northern Moesia Superior, Dardania, Macedonia Salutaris, Praevalitana and the territory of Bassianae in Pannonia Secunda. The establishment of the Archbishopric is mentioned in Justinian's own Novel XI from 535, when he promotes the Metropolitan to an Archbishop, independent from the Archbishop of Thessalonica. The establishment is seen as part of the feud between Justinian and the Archbishop of Eastern Illyricum, who was a papal vicar. The city was to become capital of Illyricum, but Thessaloniki was preferred and Justinian Prima received jurisdiction over the territories of the Diocese of Dacia. Still, the new foundation was not without importance and Justinian made sure that this city, which was one of his favourite projects, received all the necessary support. In 545 Justinian issued another law underlining the episcopal rights and status of Justiniana Prima, which is also confirmed by letters that were exchanged between Justinian and Pope Gregory I at the end of the 6th century. The city planning combined classical and Christian elements: thermae, a levantine agorai, and streets with colonnades. Typical Eastern Mediterranean features went along with numerous churches. Procopius, in his The Buildings, describes the city as follows: The town was abandoned at around 615. Invading Avars coming from north of the