Venerable Michael of Klops, Fool for Christ (1456)

In 1412, the monks of the Monastery of Klops (near Novgorod) found an unknown man, dressed as a monk, in the church, reading from the Epistles by candle-light. After the service they found him writing in one of the cells. He would not identify himself, but only repeated the questions that they asked him. They were about to eject him from the monastery, but the abbot, who was gifted with spiritual discernment, ordered that he be given a cell and allowed to remain. From that day on he lived in strict obedience and ascesis — he would eat only bread and water on Sundays, keeping a complete fast the rest of the week — but would never reveal his name or background.
  In 1419 Prince Constantine Dimitrievitch, brother of Basil I, Grand Prince of Moscow, visited the monastery. During the meal, the still-unknown monk was assigned to read from the Lives of the Saints, and Prince Constantine immediately recognized him as Michael, son of his cousin Maxim, who had disappeared without a trace many years earlier. Constantine revealed his identity to the abbot; this same Constantine later became a monk himself.
  Monk Michael lived for many more years at the monastery. In later years he was granted gifts of prophecy: once, meeting a young boy in the street, he accurately predicted that the boy would become Archbishop Jonas; he foretold the deaths of princes and archbishops, and predicted, years before the fact, that Novgorod would lose its independence. He reposed in peace in 1456.