Graffiti

Graffiti is any marks, scratchings or drawings in Dishonored, Dishonored 2, Dishonored: Death of the Outsider, or any of the DLCs made on the surface of a public place.

Graffiti should not be confused with supernatural symbols that are part of a magical process or advertisements from legitimate businesses.

Trivia

 * The clockwork soldier doodle was done by David DiGiacomo's son. David DiGiacomo is the level architect of the Clockwork Mansion. This doodle also appears as an easter egg in Deathloop, another game by Arkane Studios.