The civil government of Vatican City is headed by the cardinal president of the Pontifical Commission for Vatican City, which is the state's legislature; the state is governed under the Fundamental Law of 2000. The legal system is based on canon law, and the courts are part of the judicial system of the church. The only court special to Vatican City is a court of first instance for civil and criminal cases arising in the city.
The Vatican is above all the seat of the central government of the Roman Catholic Church. Because of the papacy's vast interest in temporal as well as spiritual affairs, an elaborate bureaucracy has been developed over the course of centuries. The pope governs the church with the College of Cardinals. He may act as he chooses without their consent, but in practice he relies on the cardinals for advice as well as for administration of the church government. The whole administrative body surrounding the pope and responsible to him is called the Curia Romana.
The papal court long had all the characteristics of a royal court, such as elaborate rituals and uniforms, and complex rules of precedence; however, since the reign of Pope John XXIII (1958–63) and the Second Vatican Council, many of the Vatican ceremonies have been greatly simplified. The bodyguard of the pope is the corps of Swiss Guards, founded in the 16th cent. and made up of a small group of Roman Catholic Swiss. Its members wear the splendid Renaissance uniforms designed by Michelangelo.