Common-law marriage, also known as sui juris marriage, informal marriage, marriage by habit and repute, or marriage in fact is a form of irregular marriage that survives only in seven U.S. states and the District of Columbia along with some provisions of military law; plus two other states that recognise domestic common law marriage after the fact for limited purposes. It is arguably the original form of marriage, in which a couple took up residency together, held themselves out to the world as a married couple, and otherwise behaved as a married couple. It has been gradually abolished in Western nation states since the sixteenth century, when the Council of Trent in 1563 ruled that no marriage thenceforth would be valid in the eyes of the Roman Catholic Church unless it were solemnised by