Street Graffiti

The term graffiti referred to the inscriptions, figure drawings, etc., found on the walls of ancient sepulchers or ruins, as in the Catacombs of Rome or at Pompeii. Usage of the word has evolved to include any graphics applied to surfaces in a manner that constitutes vandalism.
The earliest forms of graffiti date back to 30,000 BCE in the form of prehistoric cave paintings and pictographs using tools such as Animal bones and pigments. These illustrations were often placed in ceremonial and sacred locations inside of the caves. The images drawn on the walls showed scenes of animal wildlife and hunting expeditions in most circumstances. This form of graffiti is subject to disagreement considering it is likely that members of prehistoric society endorsed the creation of these illustrations.
The only known source of the Safaitic language, a form of proto-Arabic, is from graffiti: inscriptions scratched on to the surface of rocks and boulders in the predominantly basalt desert of southern Syria, eastern Jordan and northern Saudi Arabia. Safaitic dates from the 1st century BCE to the 4th century CE.