This tombstone required NO quest(title)!
If you doing already the whole Lovis Tower. Go to the Citadel Shrine, walk up to the door where you go in for Lovis. But before you're totally up, on the rihgt side you see a platform and go there to find a dead body and a little chest... In that little chest is that Penelope Amulet. Use this by the Tombstone nearby the West Valley Shrine and find something in another chest
That's all for this. Have nothing to do with a quest or something else.
Just a secret in Brocken Valley to discover!
