A convert from Calvinism, Saint John Ogilvie joined the Jesuits and was ordained to the priesthood. Doing secret ministry in Scotland, John was arrested and tortured for a number of days before being martyred on March 10, 1615.

Blessed Angela Salawa was a maid for many years, eventually becoming a Secular Franciscan who instructed other young domestics in their faith.

Saint Leander of Seville was a Catholic bishop surrounded by Arians for much of his life. He fought hard to restore faith in the divinity of Christ, using the profession of the Nicene Creed as a tool.

Saint Maximilian of Tebessa—not to be confused with Saint Maximilian Kolbe who lived centuries later—refused military service and was martyred as a result.

Saint Louise de Marillac had an open heart for the poor. Along with Saint Vincent de Paul, she eventually formed what would become a religious order known as the Daughters of Charity of Saint Vincent de Paul.

Together Saint Clement Mary Hofbauer and his fellow Redemptorist Thaddeus, preached five sermons per day while working in Warsaw, Poland.