From August 1966 to September 1969, the Museum carried out a large project of archaeological excavations and research in the area of Cim. The activities during 1966 had mainly a sounding character, with the aim of establishing the scope, type and character of the locality.

Assumptions about the existence of a late antique basilica from the end of the 5th and the beginning of the 6th century have been confirmed. Then SO Mostar, at the request of the Museum, bought the land from the owner and started the works. From 1967 to September 1969, a systematic archaeological excavation was carried out. 

In late 1969 and early 1970, experts from the Institute for the Protection of Cultural Monuments of Bosnia and Herzegovina from Sarajevo, under supervision and in cooperation with experts from the Museum of Herzegovina in Mostar, carried out conservation and restoration work on the basilica. The conservation was financed by the Mostar Municipality and the Institute for the Protection of Cultural Monuments of Bosnia and Herzegovina. Archaeological work on the basilica lasted four years. Part of the movable archaeological material, stone plastic, money, earrings, ceramics, iron, glass is stored in the Museum of Herzegovina. To this day, most of the finds have not been preserved.

In 2022, new archaeological works of an investigative audit character began on the late antique basilica in Cim. At the session held on January 20, 2004, the Commission for the Preservation of National Monuments made a decision to declare the Archaeological Area of the Late Antique Basilica in Cim a national monument of Bosnia and Herzegovina.