I am not sure if this is what you're asking for, but I'll give it a shot!
Graffiti is considered a subject matter, because it vandalized private property, and causes employees or other people to clean up after someone else's mess.
Louis Lumiere and Auguste Lumiere invented Autochrome.
Handel integrated contrast into continuity better than any other composer of his time. In addition, handel oratorios are based on religious subjects. Like bach, handel makes little fundamental distinction between sacred and secular style and used inventive accompaniments and busy counterpoint.
