> In one of the graves, they discovered a stone with several runic inscriptions. <
Hmm. Violating a grave is considered to be a terrible crime. But I guess you can poke around all you want if enough years have passed.
Even where historical or scientific curiosity is involved. There are some old graves, like Shakespeare's and the "boys in the tower" which have remained inviolate, despite interest in them by modern historians. However, these graves were not even recognized as graves, they were dug up by farmers. In a way, the archeologists are restoring ancient graves.
Oh, that trope again.