Vatican Map

• Vatican City is home to some of the most famous art in the world. St. Peter's Basilica, whose successive architects include Bramante, Michelangelo, Giacomo della Porta, Maderno and Bernini is a renowned work of Renaissance architecture. The Sistine Chapel is famous for its frescos, which include works by Perugino, Domenico Ghirlandaio and Botticelli as well as the ceiling and Last Judgement by Michelangelo. Artists who decorated the interiors of the Vatican include Raphael and Fra Angelico.

• The Vatican Library and the collections of the Vatican Museums are of the highest historical, scientific and cultural importance. In 1984, the Vatican was added by UNESCO to the List of World Heritage Sites; it is the only one to consist of an entire state. Furthermore, it is the only site to date registered with the UNESCO as a centre containing monuments in the "International Register of Cultural Property under Special Protection" according to the 1954 Hague Convention for the Protection of Cultural Property in the Event of Armed Conflict.

• In 1870, the Pope's holdings were left in an uncertain situation when Rome itself was annexed by the Piedmont-led forces which had united the rest of Italy, after a nominal resistance by the papal forces. Between 1861 and 1929 the status of the Pope was referred to as the "Roman Question". The successive Popes were undisturbed in their palace, and certain prerogatives recognized by the Law of Guarantees, including the right to send and receive ambassadors. But the Popes did not recognise the Italian king's right to rule in Rome, and they refused to leave the Vatican compound until the dispute was resolved in 1929. Other states continued to maintain international recognition of the Holy See as a sovereign entity.

• In practice Italy made no attempt to interfere with the Holy See within the Vatican walls. However, they confiscated church property in many other places, including, perhaps most notably, the Quirinal Palace, formerly the pope's official residence. Pope Pius IX (1846–78), the last ruler of the Papal States, claimed that after Rome was annexed he was a "Prisoner in the Vatican".

• In this originally uninhabited area (the ager vaticanus) on the opposite side of the Tiber from the city of Rome, Agrippina the Elder (14 BC – 18 October AD 33) drained the hill and environs and built her gardens in the early 1st century AD. Emperor Caligula (31 August AD 12 – 24 January AD 41; r. 37–41) started construction of a circus (AD 40) that was later completed by Nero, the Circus Gaii et Neronis, usually called, simply, the Circus of Nero. In AD 69, the Year of the Four Emperors, when the northern army that brought Aulus Vitellius to power arrived in Rome, "a large proportion camped in the unhealthy districts of the Vatican, which resulted in many deaths among the common soldiery; and the Tiber being close by, the inability of the Gauls and Germans to bear the heat and the consequent greed with which they drank from the stream weakened their bodies, which were already an easy prey to disease".

• The Vatican obelisk was originally taken by Caligula from Heliopolis, Egypt to decorate the spina of his circus and is thus its last visible remnant. This area became the site of martyrdom of many Christians after the Great Fire of Rome in AD 64. Ancient tradition holds that it was in this circus that Saint Peter was crucified upside-down.

• Opposite the circus was a cemetery separated by the Via Cornelia. Funeral monuments and mausoleums and small tombs as well as altars to pagan gods of all kinds of polytheistic religions were constructed lasting until before the construction of the Constantinian Basilica of St. Peter's in the first half of the 4th century. Remains of this ancient necropolis were brought to light sporadically during renovations by various popes throughout the centuries increasing in frequency during the Renaissance until it was systematically excavated by orders of Pope Pius XII from 1939 to 1941.

• In 326, the first church, the Constantinian basilica, was built over the site that early Roman Catholic apologists (from the first century on) as well as noted Italian archaeologists argue was the tomb of Saint Peter, buried in a common cemetery on the spot. From then on the area started to become more populated, but mostly only by dwelling houses connected with the activity of St. Peter's. A palace was constructed near the site of the basilica as early as the 5th century during the pontificate of Pope Symmachus (reigned 498–514).

• Popes in their secular role gradually came to govern neighbouring regions and, through the Papal States, ruled a large portion of the Italian peninsula for more than a thousand years until the mid 19th century, when all of the territory of the Papal States was seized by the newly created Kingdom of Italy. For much of this time the Vatican was not the habitual residence of the Popes, but rather the Lateran Palace, and in recent centuries, the Quirinal Palace, while the residence from 1309–77 was at Avignon in France.

• The politics of Vatican City takes place in an absolute elective monarchy, in which the head of the Roman Catholic Church takes power. The Pope exercises principal legislative, executive, and judicial power over the State of Vatican City (an entity distinct from the Holy See), which is a rare case of a non-hereditary monarchy.

• Vatican City is currently the only widely recognised independent state that has not become a member of the UN. The Holy See, which is distinct from Vatican City State, has permanent observer status with all the rights of a full member except for a vote in the UN General Assembly.