In October, 1991, a five thousand year old tattooed man 'Otzi the Iceman' made the headlines of newspapers all over the world when his frozen body was discovered by two Austrian hikers in the Tyrolean Alps between Austria and Italy. He had apparently been hunting and was caught in a snowstorm as he tried to return home.
Otzi had a total of 57 tattoos. Among them were a cross on the inside of his left knee, six straight lines 15cm long above the kidneys and numerous parallel lines on his ankles. The position of the tattoos suggest they were done for therapeutic reasons (treatment of arthritis).
Image courtesy of About.com