"Israeli prisoner Ramil Razilo was removing rubble from the planned site of a new prison ward when his shovel uncovered the edge of an elaborate mosaic, unveiling what Israeli archaeologists said Sunday may be the Holy Land's oldest church." It may turn out to be the oldest discovered church in the world.
Crosses are not used in the artwork since at the time they had not yet come into common use as a Christian symbol. One of the mosaics tells the story of two people who donated the funds to build this church for "the God, Jesus Christ."
You need to read the story here.