Sistine Chapel

One of the functions of the Sistine Chapel is as a venue for the election of each successive pope in a conclave of the College of Cardinals. On the occasion of a conclave, a chimney is installed in the roof of the chapel, from which smoke arises as a signal. If white smoke, which is created by burning the ballots of the election, appears, a new Pope has been elected. If no candidate receives the required two-thirds vote, the cardinals send up black smoke—created by burning the ballots along with wet straw and chemical additives—it means that no successful election has yet occurred.[13]

The first papal conclave to be held on the Sistine Chapel was the conclave of 1492, which took place from 6 to 11 August of the same year and in which Pope Alexander VI, also known as Rodrigo Borja, was elected.

The conclave also provided for the cardinals a space in which they could hear mass, and in which they could eat, sleep, and pass time attended by servants. From 1455, conclaves have been held in the Vatican Palace; until the Great Schism, they were held in the Dominican convent of Santa Maria sopra Minerva.[14] Since 1996, John Paul II's Apostolic Constitution Universi Dominici gregis requires the cardinals to be lodged in the Domus Sanctae Marthae during a papal conclave, but to continue to vote in the Sistine Chapel.[15]

Canopies for each cardinal-elector were once used during conclaves—a sign of equal dignity. After the new Pope accepts his election, he would give his new name; at this time, the other Cardinals would tug on a rope attached to their seats to lower their canopies. Until reforms instituted by Saint Pius X, the canopies were of different colours to designate which Cardinals had been appointed by which Pope. Paul VI abolished the canopies altogether, since, under his papacy, the population of the College of Cardinals had increased so much to the point that they would need to be seated in rows of two against the walls, making the canopies obstruct the view of the cardinals in the back row. In the wake of a conclave taking place to preserve the integrity of the marble floor on the Sistine Chapel, carpenters install a slightly elevated wooden floor alongside a wooden ramp in the entrance for those Cardinals who for one reason or another need to be transported in a wheelchair.

Exterior of the Sistine Chapel

The chapel is about 35 metres (118 feet) long and 14 m (46 ft) wide,[16] with the ceiling rising to about 20 m (66 ft) above the main floor.[10]^: 28[17]

Its exterior is unadorned by architectural or decorative details, as is common in many Italian churches of the Medieval and Renaissance eras. It has no exterior façade or exterior processional doorways, as the ingress has always been from internal rooms within the Apostolic Palace (Papal Palace), and the exterior can be seen only from nearby windows and light-wells in the palace. Subsidence and cracking of masonry also have affected the Cappella Maggiore, necessitating the building of very large buttresses to brace the exterior walls. The accretion of other buildings has further altered the exterior appearance of the chapel.

The building is divided into three stories of which the lowest is a very tall basement level with several utilitarian windows and a doorway giving onto the exterior court. Internally, the basement is robustly vaulted to support the chapel. The building had six tall arched windows down each side and two at either end, several of which have been blocked. Above the vault is a third story with wardrooms for guards. At this level, an open projecting gangway was constructed, which encircled the building supported on an arcade springing from the walls. The gangway has been roofed as it was a continual source of water leaking into the vault of the chapel.

The general proportions of the chapel use the length as the unit of measurement. This has been divided by three to get the width and by two to get the height. Maintaining the ratio, there were six windows down each side and two at either end. Defined proportions were a feature of Renaissance architecture and reflected the growing interest in the Classical heritage of Rome.

A reconstruction of the appearance of the west Wall chapel in the 1480s, prior to the painting of the ceiling

Drawing by Pinturicchio of Perugino's lost Assumption in the Sistine Chapel

Raphael tapestries in the Sistine Chapel

The ceiling of the chapel is a flattened barrel vault springing from a course that encircles the walls at the level of the springing of the window arches. This barrel vault is cut transversely by smaller vaults over each window, which divide the barrel vault at its lowest level into a series of large pendentives rising from shallow pilasters between each window. The barrel vault was originally painted brilliant-blue and dotted with gold stars, to the design of Piermatteo Lauro de' Manfredi da Amelia.[10] The pavement is in opus alexandrinum, a decorative style using marble and coloured stone in a pattern that reflects the earlier proportion in the division of the interior and also marks the processional way from the main door, used by the Pope on important occasions such as Palm Sunday.

A screen or transenna in marble by Mino da Fiesole, Andrea Bregno, and Giovanni Dalmata divides the chapel into two parts.[18] Originally these made equal space for the members of the Papal Chapel within the sanctuary near the altar and the pilgrims and townsfolk without. However, with growth in the number of those attending the Pope, the screen was moved giving a reduced area for the faithful laity. The transenna is surmounted by a row of ornate candlesticks, once gilt, and has a wooden door, where once there was an ornate door of gilded wrought iron. The sculptors of the transenna also provided the cantoria or projecting choir gallery.

The first stage in the decoration of the Sistine Chapel was the painting of the ceiling in blue, studded with gilt stars,[10] and with decorative borders around the architectural details of the pendentives. This was entirely replaced when Michelangelo came to work on the ceiling in 1508.

Of the present scheme of frescos, the earliest part is that of the side walls. They are divided into three main tiers. The central tier of the walls has two cycles of paintings, which complement each other, The Life of Moses and The Life of Christ. They were commissioned in 1480 by Pope Sixtus IV and executed by Domenico Ghirlandaio, Sandro Botticelli, Pietro Perugino, Cosimo Rosselli and their workshops. They originally ran all round the walls, but have since been replaced on both end walls.

The project was perhaps supervised by Perugino, who arrived at the chapel prior to the Florentines. It is probable that the commission of Ghirlandaio, Botticelli and Roselli was part of a reconciliation project between Lorenzo de' Medici, the de facto ruler of Florence, and Pope Sixtus IV. The Florentines started to work in the Sistine Chapel in the spring of 1481.

Beneath the cycles of The Life of Moses and The Life of Christ, the lower level of the walls is decorated with frescoed hangings in silver and gold. Above the narrative frescos, the upper tier is divided into two zones. At the lower level of the windows is a Gallery of Popes painted at the same time as the Lives. Around the arched tops of the windows are areas known as the lunettes which contain the Ancestors of Christ, painted by Michelangelo as part of the scheme for the ceiling.

The ceiling was commissioned by Pope Julius II and painted by Michelangelo between 1508 and 1512. The commission was originally to paint the twelve apostles on the triangular pendentives which support the vault; however, Michelangelo demanded a free hand in the pictorial content of the scheme. He painted a series of nine pictures showing God's Creation of the World, God's Relationship with Mankind, and Mankind's Fall from God's Grace. On the large pendentives he painted twelve Biblical and Classical men and women who prophesied that God would send Jesus Christ for the salvation of mankind, and around the upper parts of the windows, the Ancestors of Christ.

In 1515, Raphael was commissioned by Pope Leo X to design a series of ten tapestries to hang around the lower tier of the walls.[19] The tapestries depict events from the Life of St. Peter [four tapestries] the Life of St. Paul [six tapestries], the founders of the Christian Church in Rome as described in the Gospels and the Acts of the Apostles. Work began in mid-1515. Due to their large size, manufacture of the hangings was carried out in Brussels, and took four years under the hands of the weavers in the shop of Pieter van Aelst.[20] Raphael's tapestries were looted during the Sack of Rome in 1527 and were either burnt for their precious metal content or were scattered around Europe. In the late 20th century, a set was reassembled from several further sets that had been made after the first set, and displayed again in the Sistine Chapel in 1983. The tapestries continue to be used at occasional ceremonies of particular importance. The full-size preparatory cartoons for seven of the 10 tapestries are known as the Raphael Cartoons and are in London.[21]

At this point, the decorative scheme displayed a consistent iconographical pattern. The tier of Popes, which, in the scheme intended by Pope Julius, would have appeared immediately below the Twelve Apostles, would have emphasised the apostolic succession. It has been argued that the present scheme shows the two Biblical Testaments merged in order to reveal the Old predicting and framing the New, synthesizing the logic of the Christian Bible.[22]

This was disrupted by a further commission to Michelangelo to decorate the wall above the altar with The Last Judgment, 1537–1541. The painting of this scene necessitated the obliteration of two episodes from the Lives—the Nativity of Jesus and the Finding of Moses; several of the Popes; and two sets of Ancestors.

The southern wall is decorated with the Stories of Moses, painted in 1481–1482. Starting from the altar, they include:

• Moses Leaving for Egypt by Pietro Perugino and assistants
• The Trials of Moses by Sandro Botticelli and his workshop
• The Crossing of the Red Sea by Cosimo Rosselli, Domenico Ghirlandaio or Biagio di Antonio Tucci
• Descent from Mount Sinai by Cosimo Rosselli or Piero di Cosimo
• Punishment of the Rebels by Sandro Botticelli
• Testament and Death of Moses by Luca Signorelli or Bartolomeo della Gatta

• 
  Moses Leaving for Egypt
• 
  Punishment of the Rebels

The Delivery of the Keys by Perugino

The northern wall houses the Stories of Jesus, dating to 1481–1482. They include:

• Baptism of Christ by Pietro Perugino and assistants
• Temptations of Christ by Sandro Botticelli
• Vocation of the Apostles by Domenico Ghirlandaio
• The Sermon on the Mount, attributed to Cosimo Rosselli
• The Delivery of the Keys by Pietro Perugino
• The Last Supper by Cosimo Rosselli

• 
  Sermon on the Mount
• 
  The Delivery of the Keys

Resurrection of Christ

• Resurrection of Christ by Hendrick van den Broeck (1572) over Domenico Ghirlandaio's original
• Disputation over Moses' Body by Matteo da Lecce (1574) over Luca Signorelli's original

The Creation of Adam by Michelangelo

Michelangelo was commissioned by Pope Julius II in 1508 to repaint the vault, or ceiling, of the chapel.[23] The work was completed between 1508 and late 1512.[24] He painted the Last Judgment over the altar, between 1535 and 1541, on commission from Pope Paul III Farnese.[25]

Michelangelo was intimidated by the scale of the commission, and made it known from the outset of Julius II's approach that he would prefer to decline. He felt he was more of a sculptor than a painter, and was suspicious that such a large-scale project was being offered to him by enemies as a set-up for an inevitable fall. For Michelangelo, the project was a distraction from the major marble sculpture that had preoccupied him for the previous few years.[26] The sources of Michelangelo's inspiration are not easily determined; both Joachite and Augustinian theologians were within the sphere of Julius' influence.[27]

A section of the Sistine Chapel ceiling

To be able to reach the ceiling, Michelangelo needed a support; the first idea was by Julius' favoured architect Donato Bramante, who wanted to build for him a scaffold to be suspended in the air with ropes. However, Bramante did not successfully complete the task, and the structure he built was flawed. He had perforated the vault in order to lower strings to secure the scaffold. Michelangelo laughed when he saw the structure, and believed it would leave holes in the ceiling once the work was ended. He asked Bramante what was to happen when the painter reached the perforations, but the architect had no answer.

The matter was taken before the Pope, who ordered Michelangelo to build a scaffold of his own. Michelangelo created a flat wooden platform on brackets built out from holes in the wall, high up near the top of the windows. Contrary to popular belief, he did not lie on this scaffolding while he painted, but painted from a standing position.[28]

Michelangelo used bright colours, easily visible from the floor. On the lowest part of the ceiling he painted the ancestors of Christ. Above this he alternated male and female prophets, with Jonah over the altar. On the highest section, Michelangelo painted nine stories from the Book of Genesis. He was originally commissioned to paint only twelve figures, the Apostles. He turned down the commission because he saw himself as a sculptor, not a painter. The Pope offered to allow Michelangelo to paint biblical scenes of his own choice as a compromise. After the work was finished, there were more than three hundred figures. His figures showed the creation, Adam and Eve in the Garden of Eden, and the Great Flood.

The painted area is about 40 m (131 ft) long by 13 m (43 ft) wide. This means that Michelangelo painted well over 5,000 square feet (460 m²) of frescoes.[29]

The Last Judgement as it exists today

The Last Judgement was painted by Michelangelo from 1535 to 1541, between two important historic events: the Sack of Rome by mercenary forces of the Holy Roman Empire in 1527, and the Council of Trent which commenced in 1545. The work was designed on a grand scale, and spans the entire wall behind the altar of the Sistine Chapel. The painting depicts the second coming of Christ on the Day of Judgment as described in the Revelation of John, Chapter 20. High on the wall is the heroic figure of Christ, with the saints clustered in groups around him. At the bottom left of the painting the dead are raised from their graves and ascend to be judged. To the right are those who are assigned to Hell and are dragged down by demons.

The Last Judgement was an object of a bitter dispute between Cardinal Carafa and Michelangelo. Because he depicted naked figures, the artist was accused of immorality and obscenity. A censorship campaign (known as the "Fig-Leaf Campaign") was organized by Carafa and Monsignor Sernini (Mantua's ambassador) to remove the frescoes. From this campaign drew support for the more natural state of the figures. In response, phallic imagery began permeating throughout Vatican City, beginning the trend of the crude drawings in places such as in graffiti art in bathrooms, textbooks, and other public places to be easily found. This trend continues to the present day.

The Pope's Master of Ceremonies Biagio da Cesena said "it was most disgraceful that in so sacred a place there should have been depicted all those nude figures, exposing themselves so shamefully, and that it was no work for a papal chapel but rather for the public baths and taverns."[30] In response Michelangelo worked da Cesena's semblance into the scene as Minos, judge of the underworld. It is said that when he complained to the Pope, the pontiff responded that his jurisdiction did not extend to hell, so the portrait would have to remain. Michelangelo also painted his own portrait, on the flayed skin held by St Bartholomew.

The genitalia in the fresco were later covered by the artist Daniele da Volterra, whom history remembers by the derogatory nickname "Il Braghettone" ("the breeches-painter").