Nicholas of Tolentino, OSA known as the "Patron of Holy Souls", was an Italian Catholic mystic who is invoked as an advocate for the souls in Purgatory, especially during Lent and the month of November. He was a member of the Augustinians, whose churches today, together with those of the Discalced Augustinians, hold weekly devotions to St. Nicholas on behalf of the suffering souls. November 2, All Souls' Day, holds special significance for the devotees of St. Nicholas. He was canonized in 1446.