The Mullaghmast Stone, from 500-600 in Ireland. Via rawveganani.tumblr.com.
There are 4 blade marks on the left side of the stone and 2 deep ones on top, suggesting that the stone was used as part of a “sword in the stone” kingship ritual. The perpetuation of the importance of the “sword in the stone,” which comes from Arthurian legend, demonstrates the continuity of Celtic rituals even after the arrival of Christianity in Ireland.
The stone is now on the National Musem of Ireland.