Complex sentence: In 1997 he was appointed to the Patriarch of Antioch and Syncellus on 21 June 2001, by Pope John Paul II, when his age-related withdrawal from the episcopate was accepted.
Split into simpler sentences: In 1997 he was appointed to the Patriarch of Antioch and Syncellus. On 21 June 2001, by Pope John Paul II, when his age-related withdrawal from the episcopate was accepted.