Altar Tomb

From the Catholic Encyclopedia

A tomb, or monument, over a grave, oblong in form, which is covered with a slab or table, having the appearance of an altar. Sometimes the table is bare, and sometimes it supports one or more recumbent sculptured figures. It either stands free, so that the four sides are exposed, or one side may be attached to the wall, when a canopy or niche is often raised above it.

A.J. SCHULTE