John IV (died September 2, 595), also known as John Nesteutes (, Ioannes the Faster), was the 33rd bishop or Patriarch of Constantinople (April 11, 582 – 595). He was the first to assume the title Ecumenical Patriarch. He is regarded as a saint by the Eastern Orthodox Church which holds a feast on September 2. Life Joannes (surnamed Jejunator, sometimes also Cappadox) was born at Constantinople of artisan parents, and worked as a goldsmith. Under the Patriarch John III (565–577) he was deacon at the Hagia Sophia church; then he became sakellarios (an official who acts as patriarchal vicar for monasteries). He was famous for his ascetical life and called "the Faster". Under Eutychius I (552–565 and 577–582) he became an important person among the clergy of the city. At Eutychius's death he was made patriarch by the Emperor Tiberius II (578–582). According to one account, a horse show was scheduled in the Hippodrome on eve of the Feast of Pentecost. Patriarch John found his flock's attendance unacceptable. Through the patriarch's fervent prayer a terrible thunderstorm arose with rain and hailstones so that everyone dispersed in fear and came to realize the inappropriateness of such entertainment. Under the next emperor, Maurice (582–602), he was still a favourite at court. He had always a great reputation for asceticism and charity to the poor. In 587 or 588, he summoned the bishops of the East in the name of "the Ecumenical Patriarch" to examine certain charges against Gregory, Patriarch of Antioch, (although Fortescue questions on what authority). John was Patriarch of Constantinople from 582 – 595, and was the first to use the title "Ecumenical Patriarch." Patriarch Gregory was acquitted and returned to his episcopal see. A report was sent to Rome and Pope Pelagius II solemnly annulled the acts of this council. In 590 Pope Pelagius II was succeeded by Gregory I, who was initially on good terms with John IV, whom he had known when Gregory served as legate at Constantinople. In 593, John was severely blamed by Pope Gregory I for having allowed an Isaurian presbyter named Anastasius, who had been accused of heresy, to be beaten with ropes in the church of Constantinople. In 595, the controversy was again rife about the title of Ecumenical Patriarch. Gregory wrote to his legate Sabinianus forbidding him to communicate with John. In the case of a presbyter named Athanasius, accused