How many king Arthur's have there been?

What countries was discovered during the exploration of the Renaissance? How did Cleopatra rebuild Egypt? Which Greek deity was the patron of the city of Athens? What are Psyche's traits? How did Odysseus hide the slaughtering of the suitors? Who was the leader of the Aztec when Hern? What is unan? What happened that change things for Penelope during the fourth year when she was fooling the wooers weaving the robe? What is the name of the large hill around which Greek city-states were built? What does the The discus thrower statue reveal about greek values? What is the Aztec name of the figure that is represented on the Temple of the Feathered Serpent as a fanged serpent head with feathers around its neck? How much is a 1978 20 apaxmai coin worth? What city of Egypt did Cleopatra rule? What was the Royal Road? What advantages did Cortes have in his conquest of the Aztec? How does a primary source help a historian understand the past? Who won the initial battle between the Spanishand Aztecs? What would happen to Persephone if she ate anything in the underworld? Was the ziggurat of ur the first ziggurat? How did delta bc get its name?

How many king Arthur's have there been?