Tomb C is a large tomb with its façade alongside the passage, but at a different angle than tomb A and B. The façade has been preserved till the upper cornice of the wall. Below that cornice was a series of letters, made of tuff, embedded in the bricks of the wall. The only one found in place was the letter D, probably part of the letters:

                   H(uic) M(onumento) D(olus) M(alus) A(besto)
                   Let this monument be free from intentional desecration

As far as we know this is the only case the expression has been used in this way.

The entrance of tomb C is placed on the left side of the façade. The jambs and architrave are still in place. Above the entrance on a marble slab of 72 x 61 cms an inscription has been found.