John the Abstainer, Patriarch of Constantinople
Saint John became Patriarch during the reign of Tiberius, in the year 582, governed the Church for thirteen years and five months, and reposed in peace in 595. It was during this Patriarch's reign, in the year 586, that the title "Ecumenical Patriarch," not used before this, came to be instituted.
Apolytikion of John, Abp. Of Constantinople in the Fourth Tone
A model of faith and the image of gentleness, the example of your life has shown you forth to your sheep-fold to be a master of temperance. You obtained thus through being lowly, gifts from on high, and riches through poverty. John, our father and priest of priests, intercede with Christ our God that He may save our souls.