In some corners, it feels like a medieval ruin, albeit one with modern graffiti.

Starting in 1967, he is regarded as the "father of modern graffiti".

Despite the legal ambiguities, his work is perceived in the genre of modern graffiti, or "Street Art."

Cornbread is often cited as one of the earliest writer of modern graffiti.

This marked the first modern graffiti ever to be in the Smithsonian Institution.

And unfortunately modern graffiti covers some of the original drawings.

Jonah has also shown interest in modern graffiti.

The interior walls have also been defaced with modern graffiti.

Several prehistoric petroglyphs and some modern graffiti exist in the alcove.

He influenced many young writers most notably by pioneering modern graffiti on freight trains.