The motives behind forging art are simple. Art objects are often worth a great deal of money, and those who want to buy them can’t always recognize the difference between an original and an imitation. Some of the most interesting and outrageous episodes in the history of collecting art have been instigated by forgers and their victims. This lecture outlines forgery from ancient Rome until modern times. Recounted are scandals involving artists as famous as Michelangelo, and stories of forgers who bested some of the great collectors and museums of modern times.