Archaeological site Caričin grad (Iustiniana Prima) is an early Byzantine town founded in 6th century AD in south-eastern Serbia, near modern town Leskovac. It was founded by Emperor Justinian I (527-565) and served as the metropolitan seat of the then newly founded Archbishopric of Justiniana Prima.
Excavations have been carried out since 1912 and have revealed remains of an acropolis, upper and lower town consisting of 15 churches, several basilicas, plazas, workshops and administrative buildings. Other interesting and valuable findings include mosaics, reliefs, sculptures, jewelry, weapons, coins, decorative items and other objects for every-day use.