St. Alphonsus Liguori (1696 - 1787)

Alphonsus Maria de' Liguori, C.Ss.R. (September 27, 1696 – August 1, 1787), was an Italian Catholic bishop, spiritual writer, scholastic philosopher and theologian, and founder of the Redemptorists, an influential religious congregation. He was canonized in 1839 by Pope Gregory XVI. Pope Pius IX proclaimed him a Doctor of the Church in 1871.