Pope Demetrius of Alexandria was a 3rd-century bishop and the twelfth patriarch of the church in Alexandria. Before his election, he lived as a celibate farmer for forty-seven years. According to tradition, he was chosen to succeed the ailing Patriarch Julian following a vision involving a cluster of out-of-season grapes. During his forty-two-year reign, he played a vital role in organizing the ecclesiastical hierarchy and establishing liturgical calendars, earning him a reputation as a founder of the Egyptian church.