This document provides a history of graffiti from ancient times to modern day. It discusses how ancient graffiti displayed simple messages while today it often conveys social and political statements. It outlines the development of different graffiti styles over time, from cave paintings to the invention of aerosol spray paint cans. Key graffiti artists from the 1970s onward are mentioned like Cornbread, Phase 2, and Banksy. The emergence of graffiti into an accepted art form displayed in galleries is also touched on.