Opus reticulatum Tomb (Tomb D)

The name of this tomb derives from the structure of its walls, made of small blocks of pumice, in a pattern known as "opus reticulatum."

The funeral room is still covered by the ceiling; on its walls there are many niches with cineraria.

A wall built during the Constantinian era closed the entrance of the tomb; a large terracota pipe has been placed in it, either to facilitate the flow of water, or as a probable drain.

From: 'Guide to the Vatican Necropolis' by Michele Basso, Fabbrica di S. Pietro