Missionaries of Charity (MC) is a Roman Catholic Latin rite congregation started on 7 October in 1950. It was founded by Mother Teresa. It started in the slums of Kolkata (Calcutta, India) with Mother Teresa and 12 sisters. It now has a membership of nearly 5,000 sisters worldwide. Members of the religious order show they belong to this group using the order's initials, "M.C." A sister who belongs to MC must follow their vows of chastity, poverty and obedience. There is also a fourth vow, to give "wholehearted free service to the poorest of the poor." MC members all wear the same white and blue habit that Mother Teresa wore.