Ten thousand years ago people in the Near East plastered the skulls of their forebears as a way to extend the relationship between the living and the dead past the point of death.
In the nineteenth century the bereaved wore jewellery made with the hair of deceased relatives and friends.
Today you can have cremated ashes made into jewellry or incorporated into a tattoo; in the ancient world cremated human remains might be incorporated into pottery.
Some people decide that their body parts should extend the lives of other people after they die. Do they live on in their transplanted organs?