Dominic, founder of the Order of Preachers (Dominicans), died 1221
Dominic was a Spanish priest who saw the wealth of the clergy as a stumbling block for the church, so he formed a movement, the Order of Preachers (commonly called Dominicans) devoted to itinerant preaching and living in poverty.
Lawrence, deacon, martyr, died 258
As one of the seven deacons of the church at Rome, Lawrence was responsible for the church's financial matters and for the care of the poor. Asked by the emperor to gather the church's treasure, he presented a collection of orphans, lepers, and the like. The enraged emperor had him put to death.
Clare, Abbess of San Damiano, died 1253
A contemporary of Francis of Assisi, Clare and a growing number of companions established a women's Franciscan community, called the Order of Poor Ladies, or Poor Clares. She inspired other women to pursue spiritual goals.
Florence Nightingale, died 1910; Clara Maass, died 1901; renewers of society
Nightingale was born in England, and horrified her wealthy family by deciding to become a nurse. She led a group of nurses in ministering in the midst of the Crimean War, and worked for hospital reform. Maass, a native of New Jersey, was also a war nurse, and volunteered as a subject for research on yellow fever. She died of the disease.