Augustine is recognized as a saint in the Catholic Church, the Eastern Christian Church, and the Anglican Communion and as a preeminent Doctor of the Church. He is also the patron of the Augustinians. His memorial is celebrated on 28 August, the day of his death. Augustine is the patron saint of brewers, printers, Theologians, the alleviation of sore eyes, and a number of cities and dioceses. Many Protestants, especially Calvinists and Lutherans, consider him to be one of the theological fathers of the Protestant Reformation due to his teachings on salvation and Divine grace. Lutherans, and Martin Luther in particular, have held Augustine in preeminence (after the Bible and St. Paul). Luther himself was, from 1505 to 1521, a member of the Order of the Augustinian Eremites.