Cyril Lucaris was a 16th-century Greek prelate who served as both the Patriarch of Alexandria and the Ecumenical Patriarch of Constantinople. Born in Heraklion, Crete, he received an extensive European education in cities such as Venice, Padua, and Geneva, where he encountered Protestant thought. Throughout his career, he sought to reform Eastern Orthodoxy, a mission that sparked significant theological debate regarding his alignment with Calvinist doctrines. He remains a significant figure in Orthodox history due to his efforts to promote Greek education and his leadership during a period of intense religious competition.