Firstly, the article provides basic information on the biblical teaching on marriage. While the Old Testament sees marriages with numerous offspring as a high value, the New Testament shows a tendency towards celibacy, be it on account of imitating Christ or for the expectation of imminent parousia. The most important author amongst the Fathers of the Church, St. Augustine, made a significant contribution towards forming the Catholic doctrine on marriage upon which drew even the medieval scholastics. In the modern age, the Church complained about the countries which forced their concept of marriage on the Catholic faithful. Even today, the Catholic Church is against the breakdown of marriage by means of divorce. Since the Second Vatican Council, however, there has been a development, for example, as regards contracting marriages between Christians of Catholic and non-Catholic confessions. Prior to the publication of the 1983
Code of Canon Law, this was expressed in the motu proprio of Paul VI Matrimonia mixta, whose regulation did not have to be changed substantially in the Code.