His Royal Highness Prince Sultan bin Salman bin Abdulaziz Al-Saud, a grandson of Saudi Arabia's ruler, came to Kansas City for opening ceremonies of the "Roads of Arabia" exhibition at the Nelson-Atkins Museum of Art on Wednesday. Museum officials and the prince himself say the collection of 200-plus artifacts, excavated over the last four decades, shows that Arabia was not some distant desert outpost but a center of culture and innovation.