For more than a quarter of a century, Arthur Stace’s shadowy, elusive figure roamed the streets of Sydney in the darkness before dawn, unseen and unknown. It was one of the city’s biggest mysteries. Who was writing in chalk this one word, “Eternity”, on the footpaths every morning? It was written about half a million times on the city’s sidewalks. Watch this video to learn how this Graffiti changed many people’s lives around Australia.