The Irish Examiner claims, inter alia:

Having a place to visit, a place to pine in memory of the dead is a primeval need. The Romans summed it up in the phrase "Quorum quod mortale erat, hic iacet" ("Whatever was mortal is here laid").

I'm not sure the phrase is "Roman" (I think it might even be post-medieval), but it's usually rendered Quod mortale fuit, hic iacet ... not sure how the quorum would fit in there and the perfect is clearly better ...