barrow beehive tomb bone house bone pot box grave burial burial chamber burial mound catacombs cenotaph charnel house cinerary urn cist cist grave cromlech crypt deep six dokhma dolmen funeral urn grave house of death last home long home low green tent low house mastaba mausoleum monstrance mummy chamber narrow house ossuarium passage grave pit pyramid reliquary resting place sepulcher shaft grave shrine stupa tomb tope tower of silence tumulus urn vault