"Walking among the ruins of Ostria, the ancient port city of Rome, it is impossible to overlook the mosaics lining the city's walls and floors. These were the advertisements, posters and billboards of their day, identifying services, merchants and celebrities (including Alexander and Helix, famed boxers whose fists are still raised at an oyster bar), as a multicultural population of citizens and slaves connected themselves through a web of trade routes."

From Tiles to Pixels: Media and the City Roy Strickland