Catacomb
An underground burial passage — a long tunnel lined with the dead of many generations.
A catacomb in a dream is the dream's image of an underground passage lined with the dead of many generations. The catacomb is not a single grave; it is a corridor of them, and the living walk past them. The dream brings the catacomb when something in your life — a family history, an inherited cultural memory, a long professional lineage — is being walked through with the awareness that every wall is somebody. A catacomb passed through with the right respect is the dream affirming the honest contact with the long dead. A catacomb walked through with the presence treated as decoration is the dream noting that the depth was real and the depth is being skimmed.