Stone in London
The Stone in London was one of the names of the Stone of Destiny.
This title referred to the Stone's stay in London between 1296 (when Edward I carried it off from Scotland) to 1996, when the British government returned it to Scotland (and maybe also to its brief visit to London in 500, courtesy of Merlin and King Pelles, when it played a role in making the young Arthur Pendragon King of Great Britain). ("Rock & Roll", "Rock of Ages")