Ancient culture merged with "modern" culture, especially after Constantine created the new capital of the Roman Empire, Constantinople. Near Matera in Basilicata, even caves built into the rock face became churches. The frescoes on those walls are quite stunning.
Matera is all about caves and grottoes. There were many natural caves that were expanded to be used as dwellings and churches, and other man-made grottoes as well.
Matches in Transcript
Caption 18 [it]: Questo accadeva qui, in Basilicata, Caption 18 [en]: This was happening here, in Basilicata,