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This document discusses the history of murals from ancient Rome to the 20th century. It notes that ancient Romans used pigments on dry plaster walls for murals like Russo Pompeian red and Actual Golden. In Italy, Leonardo da Vinci's The Last Supper mural from 1495-1498 used pigments on dry plaster walls. In the 20th century, murals expanded to include graffiti using markers, paint, and spray cans on surfaces like trucks and cars to represent ideas like music can fly.