The Company of the Daughters of Charity of Saint Vincent de Paul, sometimes simply referred to as Daughters of Charity, is a Society of Apostolic Life

Society of Apostolic Life

A society of apostolic life is a group of men or women within the Catholic Church who have come together for a specific purpose. Unlike members of an institute of consecrated life , members of apostolic societies do not make religious vows...

 for women within the Catholic Church. Its members take simple, private, annual vows. It was founded in 1633 and devoted to serving Jesus Christ in persons who are poor through corporal and spiritual works of mercy.

The full title of the congregation is the Daughters of Charity (the people of Paris used this term for the sisters), Servants of the Sick Poor.