 However, because historical documents for the post-Roman period are scarce, a definitive answer to the question of Arthur's historical existence is unlikely.Sites and places have been identified as "Arthurian" since the 12th century, but archaeology can confidently reveal names only through inscriptions found in secure contexts.The so-called "Arthur stone", discovered in 1998 among the ruins at Tintagel Castle in Cornwall in securely dated 6th-century contexts, created a brief stir but proved irrelevant.