Nephon I of Constantinople was an Eastern Orthodox prelate who served as the Ecumenical Patriarch between 1310 and 1314. Born in Veria, he navigated complex ecclesiastical politics during his short tenure. While some contemporary critics, such as Nicephorus Gregoras, questioned his suitability for the office by alleging illiteracy and a preference for luxury, Nephon is noted for his diplomatic approach. His willingness to seek compromise played a vital role in resolving the Arsenite Schism within the Byzantine Church.