The origin of the name of the Kings' Highway is still a mystery. Some say that it originated in the Bible when Moses, who took this route after crossing Sinai, asked the Edomite king for permission to pass through. Others claim that the road was named after Queen Sheba, who came to visit King Solomon. Still others believe that its nickname is simply due to its majestic, almost regal appearance.
Whatever the case, the Kings' Highway is a major route in Jordan, which has seen many merchants from East and West, Christian pilgrims and then Muslims pass through when it was still just a caravan route.