Lucius Artorius Castus was a Roman military commander. A member of the gens Artoria, he has been suggested as a potential historical basis for King Arthur.
Drawing of the Lucius Artorius Castus inscription from Podstrana, as read (with minor errors) by professor Frane Bulić in the late 1880s (source: T. G. Jackson, "Dalmatia, the Quarnero and Istria", Oxford, 1887, pp. 167)
Historicity of King Arthur
The historicity of King Arthur has been debated both by academics and popular writers. While there have been many claims that King Arthur was a real historical person, the current consensus among specialists on the period holds him to be a mythological or folkloric figure.
Former site of Arthur's purported grave in "Avalon" at Glastonbury Abbey