You're right. This is not the best title. The original news story (linked above) is to Bloomberg which is a blocked source. They entitled their news story: Vatican Necropolis Gives Up Secrets After Escaping Construction
I searched other news sources but the best I could find were the photographs released by the Vatican which are posted above. CNN and USA Today are now catching up. BTW - those terracotta pipes projecting from the ground, are funnels where visitors would pour honey and other foods down to the deceased.
Here's one more photo.
In this undated photo provided Monday, Oct. 9, 2006 by the Vatican Museums, a mosaic floor is seen in an ancient necropolis unearthed at the Vatican.
The bloomberg headline reads like a bad babblefish translation of pravda.