“King Arthur had a famous sword and Joanne d’Arc found some ancient swords hidden behind the fireplace of an old building ~ they were considered rather impressive.”
Get out of town! Arthur had the sword of Jeanne d’Arc? S’pose this was the sword in the stone? It was legend.
There is a recent article about someone perhaps discovering the Round Table, in Scotland, I think. That might be a dig to see. I do love rocks. Well, most of them. The black rock excepted.
Someone could do a tidy business over in the ME making talismans and jewelry out of the retired black rocks. Or new ones among the sands. Picking one up is probably punishable by death.
That's the real question here ~ not whether or not Arthur actually had a shiny sword that could cut other swords into pieces.
And where did you get the idea Arthur had Jeanne's swords. I don't think anyone ever said that. Besides, there are numerous "ancient swords".