Roman monumental tomb (1st century) near the catacombs of San Sebastiano, Rome, Via Appia Antica.

In the lay-by rise of the the catacombs of San Sebastiano are three early Roman monumental tombs (mausolea) dating back to the early 1st century.

The first one on the right is externally decorated with paintings (funeral banquets and the exorcism of the Gerasene demoniac) and still bears an inscription with the name of the owner, Marcus Clodius Hermes; the interior houses graves and pictures and shows a vault decorated with the head of a gorgon.
The second one, called Mausoleum of Innocentiores referring to the funeral college to which it belonged, has a vault decorated with refined stuccoes; some recesses show inscriptions with Greek characters but written in Latin, as well as a graffito with the initials of the Greek words meaning "Jesus Christ Son of God Savior" (Ichtys).
On the left there is the Mausoleum of the Adze, from the tool depicted on the exterior, whose decoration consists of shoots of vine sprouting from kantharoi placed on false pillars.

Formerly the area was a pozzolan mine; it was abandoned at the end of the 2nd century and then used by Romans as a place for pagan burial: simple graves for slaves and freedmen have been discovered, as well as monumental tombs, particularly in the so-called piazzola ("little square"), a circular compartment that formerly was an opencast mine, in which walls three mausoleums were dug.

more on https://en.wikipedia.org/wiki/Catacombs_of_San_Sebastiano