THE COLUMBARIA OF HYLAS AND VITALINE.

The columbaria were underground chambers, containing niches in the walls, in which were placed the urns containing the ashes of those who were burned. As the niche was like a dove's nest in shape, it was called a "columbarium," the whole tomb a "columbaria." This one was discovered by the Marchese Campana, and is carefully preserved. Here were buried the freedmen of Augustus while Hylas and Vitaline were the custodians.

Returning to the Via Appia, the second gate on the left admits to the