Uncovered in the 1960s..the under ground church used by the apostles. As Jesus instructed them, they waited in Jerusalem after the His resurrection.
If this is genuine ..and it appears so, this is the very first Christian church, with the Lord's half brother James as overseer.
The above ground structure is of course of a recent construction, built to preserve the original.
https://www.youtube.com/watch?v=HoEvDkzRRj8 Between the 5:30 to 6:00 minute mark, artifacts and the early Christian symbol is described, which shows the lineage of Christianity..
From the menorah, to the Star of David..with the early Christian symbol of the fish (fishers of men), descending from the star.
All the apostles were of course, Jewish, even though some had Greek names, so it shows in their early pictograph..