John II Platyn
John Platyn or Platinus was an Exarch of Ravenna (687-701 or 702).
John replaced Theodore II as exarch in 687. That same year, he took an active role in a disputed papal election. Bribed by the archdeacon Paschal, he demanded that the latter should be made pope. Conflict with another papal candidate, Theodore, seemed inevitable, but then a compromise candidate, Sergius I, was made pope. Paschal did not give up hope, however: he promised John a hundred pounds of gold in exchange for the papacy. John quickly came to Rome, but found that it would be too difficult to go against the majority. He therefore recognized Sergius, but demanded from the pope the hundred pounds of gold that Paschal had promised. Sergius protested, saying he had made no such agreement; when John did not give up his demands, he took the holy vessels of St. Peter's Basilica, claiming they were all he possessed. The local populace, becoming increasingly angry at the exarch, rallied to the pope and paid the sum demanded.