What is the origin of excalibur?

What are the two benefits Persia gained through trade? Was Alexander the great related to Hercules? Why is Aphrodites roman name Venus? Why is Anubis Egyptian god in your sleep? Which ancient civilization was the first to use city planning and sewr systems? Why were the Spanish able to conquer the Aztec empire and the Inca empire? Prestent day meaning of as difficult as the judgment of Paris? Where do brady's come from? Who is Aeneas' parents? What was the goddesses name that fond Odysseus? What is the goddess- protector of Athens? What is the origin of the word ingrate? Did Zeus truly eat his kids? What element did ancient egyptians made black eye make-up? What five city states are located in the mainland of ancient Greece? How people choose leader in the ancient period? What was one characteristic that was shared by the first civilization in Mesopotamia China and Egypt? Who were the Indians led by Montezuma? Who assisted to the Odysseus? How does Odysseus and his men finally escape from the cyclops Polyphemus?