Almost all people have seen graffiti somewhere, on walls or on a random pole. They are usually illegal in most countries, but if they’re drawn on appropriate places, or if you have permission, then it’s considered street art.
A mural and some tags from western germany and some tags from eastern germany
The walls of each city are different, as are the magic and sky. A different impression, a different story on each wall. Maybe we’ll never know. But we can dream.