Cosmas III of Constantinople was an influential Eastern Orthodox prelate who held several high-ranking ecclesiastical offices during the early 18th century. Born around 1650 in Chrysoupoli, Chalcedon, he eventually rose to serve as the Ecumenical Patriarch of Constantinople between 1714 and 1716. His extensive leadership within the church also included roles as the Greek Orthodox Patriarch of Alexandria and the Archbishop of Mount Sinai and Raithu, marking him as a significant figure in the religious hierarchy of the Ottoman Empire.