The archaeological exploration of the area started after some artefacts were discovered during construction works for the Šibenik Agglomeration project.
Archaeologist Slavko Galiot said on Monday that there were many similar cemeteries across Dalmatia, however, this was a record high number of sculls found at one site.
The experts included in the exploration say that of the 600 remains, 200 skeletons belonged to children.
The last burials in this cemetery were held in 1827.
The church near the cemetery was built in the third decade of the 14th century, said Galiot.