However his ultimate aim was to reform the Orthodox Church along Calvinistic lines, and to this end he sent many young Greek theologians to the universities of Switzerland, the northern Netherlands and England. In 1629 he published his famous Confessio (Calvinistic doctrine), but as far as possible accommodated to the language and creeds of the Orthodox Church. It appeared the same year in two Latin editions, four French, one German and one English, and in the Eastern Church started a controversy which culminated in 1672 with the convocation by Dositheos, Patriarch of Jerusalem, of the Synod of Jerusalem by which the Calvinistic doctrines were condemned.Cyril was also particularly well disposed towards the Anglican Church, and his correspondence with the Archbishops of Canterbury is extremely interesting. It was in his time that Mitrophanes Kritopoulos - later to become Patriarch of Alexandria (1636–1639) was sent to England to study. Both Lucaris and Kritopoulos were lovers of books and manuscripts, and many of the items in the collections of books and these two Patriarchs acquired manuscripts that today adorn the Patriarchal Library.
Lucaris was several times temporarily deposed and banished at the instigation of both his Orthodox opponents and the Jesuits, who were his bitterest enemies. Finally, when the Ottoman Sultan Murad IV was about to set out for the Persian War, the patriarch was accused of a design to stir up the Cossacks, and to avoid trouble during his absence the Sultan had him killed by the Janissaries on June 27, 1638 aboard a ship in the Bosporus. His body was thrown into the sea, but it was recovered and buried at a distance from the capital by his friends, and only brought back to Constantinople after many years.
No relation.