The stigmata are the marks of the wounds of Christ that appear on the bodies of believers.
Ian Wilson, in his book Stigmata: An Investigation Into the Mysterious Appearances of Christ's Wounds in Hundreds of People from Medieval Italy to Modern America, says that there have been more than 300 stigmatics since St. Francis of Assisi. Besides St. Francis, the list ranges from such well-known people as Blessed Angela of Foligno, St. Catherine of Siena and Padre Pio to Johann Jetzer, a poor farmer, and Cloretta Robinson, a Baptist girl from West Oakland, California.
Wilson concludes that the presence of the stigmata is not a guarantee of sanctity or the miraculous. He sees the phenomenon as surrounded by mystery but also sees a relationship with the phenomena of multiple personalities and hypnosis and the power of mind over matter.