There is an old saying which goes like this : "A dead man is the landlord of six feet ! " It most probably owes its origin to the custom of burying the dead under six feet of land. I am curious to know if the Catholic Church has a written rule or protocol governing the depth of the grave in a cemetery that a grown-up dead faithful can be buried in.
As far as universal rules are concerned, Canon 1243 is relevant:
- Appropriate norms are to be enacted by particular law for the management of cemeteries, especially in what concerns the protection and fostering of their sacred character.
The depth of a grave is part of the cemetery's management, and is governed by “particular law” — which might be a civil law or a ruling in a particular territory (Conference or even diocese).
My translation is prepared by the Canon Law Society of Great Britain and Ireland, 1983