The Olavide Museum, founded in the late 19th century, contains hundreds of life-sized models of people infected with cutaneous diseases, from ringworm to syphilis. The graphic models helped medical students diagnose illnesses. The wax figures are no longer used as a teaching tool. But the museum still teaches visitors history, and contains the stories of the real patients at a time before modern medicine. The World’s Gerry Hadden reports from Madrid.