Its origin and its development is connected with the figure of the Cardinal Vicar, who, in the name of the Supreme Pontiff – Bishop of Rome holds the Diocese of Rome.
‘s office, with very broad powers, was originally entrusted, especially in cases of absence of the Pope from Rome, a Cardinal or an Archbishop or a Bishop.

Pope Paul IV in 1558 established that the Vicar of Rome was a member of the Sacred College. St. Pius X, with the Constitution of the ETSI nos January, 1912, Rome gave a real sort: it divided into four offices, the first for Divine Worship and for the apostolic visitation, the second for the discipline the clergy and the Christian people, the third to court documents, the fourth for the administration and property. To them he preceded the four prelates, appointed by the Pope.

The latter confirmed the powers already granted to the Cardinal Vicar, who, in the name and mandate of the Roman Pontiff, exercising episcopal ministry of teaching, sanctifying and pastoral governance of the Diocese of Rome with ordinary vicarious power, in the terms established by the same Pontiff. He never ceases from his office during the vacancy of the Apostolic See.

The Vicegerent, who was appointed by the Holy Father and awarded the title of Archbishop, ordinary vicarious jurisdiction in close communion and constant liaison with the Cardinal Vicar, within the limits set.

Bishops Auxiliaries are Episcopal Vicars and exercise their pastoral ministry in the field or in the pastoral land for which they were appointed. Along with the Vicegerent and the Prelate Secretary form the Council of Bishops of the Diocese, presided over by the Cardinal Vicar. They are divided into pastoral offices, administrative offices and courts. In particular, at the Vicariate are made ​​up of three separate courts (the Ordinary of the Diocese of Rome.

shall be referred to this new court in the second instance marriage cases dealt with at first instance by the Regional Court and the Regional Courts of Naples.
appeal in the same court is also the cause of the diocesan tribunals of Rome and the other dioceses of New York.