Missionaries of Charity
Missionaries of Charity is a Roman Catholic religious congregation
Congregation (catholic)
The term "congregation" has three usages specific to the Roman Catholic Church. One concerns the Roman Curia, the other two concern religious institutes.- Roman Curia :...

 established in 1950 by Mother Teresa of Calcutta, which consists of over 4,500 sisters and is active in 133 countries. Members of the order designate their affiliation using the order's initials, "M.C." Member of the Congregation must adhere to the vows
Religious vows
Religious vows are the public vows made by the members of religious communities pertaining to their conduct, practices and views.In the Buddhist tradition, in particular within the Mahayana and Vajrayana tradition, many different kinds of religious vows are taken by the lay community as well as by...

 of chastity
Chastity refers to the sexual behavior of a man or woman acceptable to the moral standards and guidelines of a culture, civilization, or religion....

, poverty
Poverty is the lack of a certain amount of material possessions or money. Absolute poverty or destitution is inability to afford basic human needs, which commonly includes clean and fresh water, nutrition, health care, education, clothing and shelter. About 1.7 billion people are estimated to live...

 and obedience
Vow of obedience
The Vow of Obedience in Catholicism concerns one of the three counsels of perfection. It forms part of the vows that Christian monks and nuns must make to enter the consecrated life, whether as a member of a religious institute living in community or as consecrated hermit...

, and the fourth vow, to give "Wholehearted and Free service to the poorest of the poor".

Today, the order consists of both Contemplative and Active Branches of Brothers and Sisters over several different countries.