This is a list of the top-level leaders for religious groups with at least 50,000 adherents, and that led anytime from January 1, 1401, to December 31, 1500. It should likewise only name leaders listed on other articles and lists.
Dionysius I, was Ecumenical Patriarch of Constantinople two times, from 1466 to 1471 and from 1488 to 1490. He is honoured as a saint in the Eastern Orthodox Church and his feast day is November 23.
Symeon I of Trebizond, was Ecumenical Patriarch of Constantinople three times: for a short time in 1466, from 1471 to 1475 and from 1482 to 1486. In 1484 he presided over the Synod of Constantinople of 1484 which repudiated the Union of Florence.
Patriarch Nephon of Constantinople may refer to: