This is the basic graphic formula for the representation of the tomb - a combination of image and text and a likeness of the deceased.
 
 
The most richly hilarious is the first example where seemingly the grave is far from silent.

 
1408 - Leger du Moussel and Olivier Bourgeois
 
 
1352 - Jean I de Neelle and Marguerite de Mello
 
 
1301 - Thierry de Villebeon and Guillaume de Villebeon