The Holy See (Latin: Sancta Sedes, "holy seat") is the episcopal see of Rome. The incumbent of the see is the Bishop of Rome — the Pope. The term Holy See, as used in Canon law, also refers to the Pope and the Roman Curia—in effect, the central government of the Catholic Church—and is the sense more widely used today.
Although every episcopal see is seen as holy and the Eastern Orthodox Church constantly applies the adjective "holy" or "sacred" (ἱερά) to all its sees, "the Holy See" (in the singular and with the definite article and no other specification) normally refers to the see of Rome, which is also called "the Apostolic See". While "Apostolic See" can refer to any see founded by any of the Apostles, the term is in this case used to refer to the see of the bishop seen as successor of the chief of the Apostles, Saint Peter.
The Pope governs the Church through the Roman Curia. The Roman Curia consists of the Secretariat of State, nine Congregations, three Tribunals, 11 Pontifical Councils, and a complex of offices that administer church affairs at the highest level. The Secretariat of State, under the Cardinal Secretary of State, directs and coordinates the Curia. The current incumbent, Tarcisio Cardinal Bertone, is the Holy See's equivalent of a prime minister. Archbishop Dominique Mamberti, Secretary of the Section for Relations With States of the Secretariat of State acts as the Holy See's foreign minister. Bertone and Mamberti have been named in their respective roles under by Pope Benedict XVI in September 2006.
Among the most active of the major Curial institutions are the Congregation for the Doctrine of the Faith, which oversees church doctrine; the Congregation for Bishops, which coordinates the appointment of bishops worldwide; the Congregation for the Evangelization of Peoples, which oversees all missionary activities; and the Pontifical Council for Justice and Peace, which deals with international peace and social issues.
Three tribunals are responsible for judicial power. The Sacra Rota is responsible for normal appeals, including decrees of nullity for marriages, with the Apostolic Signatura being the administrative court of appeal and highest ecclesiastical court. The Apostolic Penitentiary is different from those two and, instead of dealing with contentious cases, issues absolutions, dispensations, and indulgences.
The Prefecture for Economic Affairs coordinates the finances of the Holy See departments and supervises the administration of the Patrimony of the Holy See, an investment fund dating back to the Lateran Pacts. A committee of 15 cardinals, chaired by the Secretary of State, has final oversight authority over all financial matters of the Holy See, including those of the Institute for Works of Religion, the Vatican bank.
The Prefecture of the Papal Household is responsible for the organization of the papal household, audiences, and ceremonies (apart from the strictly liturgical part).
Like any episcopal see, the Holy See does not dissolve upon the death or resignation of the reigning Pope. It instead operates under a different set of laws sede vacante. During this interregnum, the heads of the dicasteries of the Roman Curia (such as the prefects of congregations) cease to hold office immediately, the only exceptions being the Major Penitentiary, who continues his important role regarding absolutions and dispensations, and the Cardinal Camerlengo, who administers the temporalities (i.e., properties and finances) of the Holy See during this period. The government of the Holy See, and therefore of the Catholic Church, then falls to the College of Cardinals. Canon Law prohibits the College and the Camerlengo from introducing any innovations or novelties in the government of the Church during this period.