Ancient graffiti - hundreds of thousands of informal, ephemeral texts spanning millennia - offer a patchwork of fragmentary conversations in a variety of languages spread across the Mediterranean world. Cut, painted, inked or traced in charcoal, the surviving graffiti present a layer of lived experience in the ancient world unavailable from other sources. Graffiti in Antiquity reveals how and why the inhabitants of Greece and Rome - men and women and free and enslaved - formulated written and visual messages about themselves and the world around them as graffiti.