A close-up of a statue that depicts King Arthur at Tintagel, a site associated with King Arthur that flourished between the fifth and seventh centuries in Cornwall, England. A sizable castle was built there in the 13th century. (Image credit: David Collingwood via Alamy) Legend has it that King Arthur and the Knights of the Round Table were busy heroes, with tales of them slaying a giant, organizing a successful search for the Holy Grail , and ruling a kingdom from a city called Camelot . Some stories say Arthur was conceived or born at Tintagel, a site in Cornwall, England, that flourished between the fifth and seventh centuries. While many stories of King Arthur are likely false or greatly exaggerated, there is one question that scholars have long debated: Did King Arthur really exist? A work of fiction? SIGN UP FOR OUR NEWSLETTER (Image credit: Marilyn Perkins / Future) Sign up for our weekly Life's Little Mysteries newsletter to get the latest mysteries before they appear online.…