RIYADH: The courtyards of the King Abdulaziz Historical Center in central Riyadh came alive on Tuesday evening with the launch of the Noor Riyadh Festival, attended by creatives from around the world. London-based artist collective United Visual Artists transformed the night sky into a living canvas with a preview of their drone show “Aether.” Featuring 1,500 drones, the seven-minute performance explored the silent harmony of the stars and planets.