Many accusations were also made against him, the principal one being that “He inflicts the stigmata on himself with acid”. Some went as far as to put microphones in his confessional to trap him. In vain. Over several decades, six or seven teams of medical experts examined him and declared that a fraud was impossible. All through his life, Padre Pio was distinguished by the appearance around his person of the mysterious phenomenon called ‘the dark night’ ("La Notte Oscura"), an internal purifying night made of unspeakable suffering and known by all the great mystics (the expression comes from Saint John of the Cross).