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CASTEL SANT’ANGELO

Rome, Italy

This research will review the most important historical stages of the building, explaining the main changes through a historical timeline. Each level will be analyzed carefully using a 3D model of the building.

The building has been studied in order to improve knowledge about Roman architecture and structures. As this castle is one of the most important buildings of the Roman period, going through several changes, it's considered to represent a good object to be analyzed.

The Mausoleum of Hadrian, also known as Castel Sant’Angelo is a building located in Rome, Italy. The Castle is a complex structure with strong contrasts in its architecture, sculpture, and painting. During its existence, the building has been adjusted continuously to different uses. This has been going on over a period of several centuries. The result is one of the Roman Empire's masterpieces.

Course

History and Theory of Arch

Professor

P. Sustersic
J. Prokopljevic

Year

2018

Castel Sant’Angelo

2 THEORETICAL FRAMEWORK

2.1 MAUSOLEUM

The Castel Sant’angelo appears prominently in the history of Rome and of the Catholic church. The building of the mausoleum started in 123 AD and was completed in 139 AD during the reign of Hadrian's successor, and next Roman emperor, Antoninus Pius. During the years the Castel Sant’Angelo was constructed, it was the tallest building in Rome. Originally the building was cylindrical and decorated with marble. On top was a roof garden with trees and a quadriga of Hadrian, made of gold.

Castel Sant’Angelo nowadays is a square construction, 89 meters wide based on a cylindrical colonnaded drum 64 meters in diameter. From Hadrian's until the Caracalla family, the Roman emperors and their families were buried in this mausoleum as late as 217 AD.

They say the statue of Archangel Michael on top of the building was placed as a sign of the end of the plague from 590 AD. From this moment on the building was known as Castel Sant’Angelo. In the years from then on the statue has been substituted six times.

Primitive Hadrian's mausoleum

2.2 FORTRESS

During the war, there was the need for more military bases, which led to a conversion in 401 AD, the mausoleum was changed into a fortress to be used by the military. This continued until the 14th century. After it was used as a castle. This was done as a protection of the pope. In case of an emergency, a secret fortified tunnel was added. It led to the Vatican city. This way the pope could seek refuge when under siege. Castel Sant'Angelo has had various functions over the years. In order to ensure that all these functions were possible, changes, adjustments, and additions were necessary.

It began as Emperor Hadrian, had built the mausoleum as he wanted it to be. At that time, there were some statues on the mausoleum that served to keep out or drive away Goths. Apparently, the subsequent owners did not think them sufficient or convenient enough.

The Roman emperors needed it to be part of their defense structure and made a castle of the mausoleum. In order to obtain this goal, additional walls (including the Aurelian Wall) and towers were erected under the emperor Aurelianus. An accessory kind of fortress was built for extra defense. This was during the time of the attacks of the barbarians. Unfortunately, many renovations and tombs have been lost as a result of the conversion from a mausoleum to a castle. Up to and including the 16th century the defenses were improved. First, after the Goten had left, a conflict arose between the popes and the nobility, around the castle. Both parties had the Castel Sant'Angelo converted into a well-fortified fortress, with the intention to protect the Vatican from possible enemies including the Roman nobility and bourgeoisie.

2.3 PASSETTO DI BORGIO

For additional security of the Vatican, Pope Nicholas III had the Passetto di Borgio (Italian for "passage", aka Corridoio (Corridor)) built in 1277. This was in fact, as the name suggests, a wall connecting the Apostolic Palace and the Castle to the Aurelian wall. The Passetto was used by the popes when under siege. The popes could just run from the Vatican to the impregnable Castel Sant'Angelo. In this way, they were safe for invaders. Several popes used the passage, for this reason. Clement the VII crossed the passetto when his life was in danger during the sacking of Rome in 1527.

Passetto di borgo

2.4 TREASURY

Later the Castel Sant'Angelo was decorated by Pope Paul III as a papal treasury. He also added more comfort, to make it suitable as a residence for a longer period of time. Although the Castel Sant'Angelo was decorated like a treasure trove. This luxurious layout was used a residence in times of need. For comfort, for example, beautiful furniture (eg frescoes), and other interior decorations were made. This made it more attractive for popes to use, especially if they needed to stay there for a longer period of time.

Paul III room and furniture

2.5 PRISON

At a certain point in time thereafter, the downstairs rooms were used as prisons, resulting in the placement of torture machines on these floors.

Years later came a period of relatively few changes, or at least no structural ones. The castle was in that period occupied by soldiers who remained loyal to Napoleon. They were surrounded by an army from Naples. Naples was at that time the kingdom of Prince Murat, who happened to be Napoleon's brother-in-law.

2.6 MUSEUM

In September 1870, the building was handed over by the Vatican to the Italian army. It was the beginning of yet another function. From 1901 on, Castel Sant'Angelo would serve as a museum. This museum comprised 58 halls showing history until then. In these recent years, people are mainly concerned with improving the appearance of the castle/museum, through restorations, adjustments and/or additions.

2.7 PONTE SANT’ANGELO

A good example of this is the addition of the angelic statues on the Pons Aelius at the end of the seventeenth century, the baroque period. The original bridge was then decorated by Bernini. It is since then known as the Ponte Sant’Angelo. This is not considered part of the original building. Incidentally, part of the original castle has now been restored and transformed into a park. Contemporary Castel Sant'Angelo consists of no less than 5 floors:

  • Floor 1 starts with the spiral staircase and is very long.
  • Floor 2 contains the cells and the storage rooms
  • Floor 3 is mainly the military floor, but there are also two large fields.
  • Floor 4 is the residential area and consists of many different rooms and other living areas. It is decorated with beautiful frescoes by among others, Giulio Romano and Perin del Vaga.
  • Floor 5 is the top floor and has a large terrace with, among other things, the famous bronze archangel Michael.

3 THE SIGNIFICANCE OF LOCATION

The building is located in the actual city of Rome, just a couple of blocks from the Vatican city, situated in front of the river Tiber. One possible explanation for the choice of this location was Hadrian’s two-fold priorities with regards to his legacy. On one hand, the proximity to older Roman burials provides a link between Hadrian and Roman greats of the past. Especially to Augustus (whose Mausoleum would have been visible a few hundred meters to the east). At the same time, by choosing this location to build his Mausoleum on the opposite side of the river, Hadrian emphasizes his own uniqueness among all of these historical figures.

While it is not entirely clear why the location was chosen as it was, the implications of the choice are more clear. The Pons Aelius provided a new, easy link between the Campus Martius and Ager Vatican. Additionally, transportation in the area was enhanced by the new roads built as part of the complex. Based on building history and literary records, extensive use of the area really started after completion of Hadrian’s monument.

4 STRUCTURE AND SCALE

Since so little of the upper structure remains, there has been significant difficulty in reconstructing details of the upper levels. However, what remains of the base makes it fairly clear that the building was a five-tiered, circular structure. It can be inferred from the surviving structure that the Mausoleum was nearly 40 meters high and spanned a diameter of nearly ninety meters. While the interior structural walls were mostly of concrete and brick, the external surfaces were faced with travertine and Luna marble and finely decorated with a frieze and other embellishments.

Section of the main building

5 ANALYSIS

The analysis will begin at the first level since it is not possible to analyze the ground floor.

5.1 FIRST LEVEL

5.1.1 THE HADRIAN’S MAUSOLEUM (A)

Here the remains of Hadrian and members of the imperial family up to Caracalla were laid to rest. Originally, the room’s ceiling was decorated with stucco and the walls covered in marble: in particular, proof of the presence of this marble comes from the holes from the iron hooks that were used to secure the marble. The urns had to be placed on the lintels inside the two large niches that open out on the walls.

To the left, is a marble commemorative plague-bearing some of the verses written by Hadrian, dedicated to his soul and made famous by Marguerite Yourcenar in her novel Memoirs of Hadrian, published in 1951.

First level

5.1.2 THE SPIRAL STAIRCASE (B)

Originally linked the atrium of Hadrian's Mausoleum with the Urns Room, climbing a difference in height of over 12 meters: the funeral procession carrying the emperor's remains passed along here. 3 meters wide and about 6 meters high, the ramp is made of brick using a sophisticated technique of imperial architecture.

The original floor would have had a central runner in travertine stone with edges in black and white mosaic, still partly visible. The walls would have been embellished with marble slabs up to a height of about three meters. On the vault, originally covered in stucco, there are still four air outlets required to let in light and for the transport of materials.

In correspondence with the transformation of the mausoleum into a fortress, the ramp was buried because regarded as easily attackable by the enemy: It was only reopened in the early nineteenth century.

5.2 SECOND LEVEL

5.2.1 THE YARD (A)

It derives its semi-circular shape form that of the cylinder of Hadrian's Mausoleum. The current structure owes much to Alexander VI who, at the end of the fifteenth century, brought impressive works to this part of the castle, hence its name, the Alexander VI courtyard. The pope's coat of arms appears on the well to the left, which drew from a large cistern dating from Roman times located below ground level: the three manholes in travertine that open in correspondence with the cistern can still be seen today.

At the time of Leo X Medici, the courtyard hosted theatrical performances: this is why it was also called the theatre courtyard.

A catapult and numerous stone balls are also preserved here, which were originally thrown at enemies from the walls. The courtyard leads to the historical prisons, the oil mills-food stores- and the stove, that is, Clement VII’s bathroom: the ticket office will give you all the information you need to visit it.

Second level

5.2.2 THE COURTYARD OF HONOR (B)

This can be found in the papal apartments that extend out to the left. From the fifteenth century onwards, the popes decided to built apartments fitted with every comfort in the Castle. They made good use of them especially as places of refuge when they were forced to flee the Vatican. Clement VII, for example, stayed there for seven months during the Sack of Rome in 1527.

The statue of St.Michael the Archangel sculpted by Raffaello da Montelupo in 1544 for the highest terrace at Castel Sant’Angelo stands in the center; it was transferred here in the eighteenth century and from that moment onwards the courtyard was known as the Angel's Courtyard.

Heading towards the staircase leading to the upper ring we pass in front of the Leo X chapel’s aedicule designed by Michelangelo Buonarroti; Raffaello da Montelupo later modified the aedicule.

5.2.3 ROOMS OF POPE CLEMENT VIII (C)

They are part of the complete apartments built by this pope between late sixteenth and early seventeenth.

It is also good to mention that this where one of the most modern and luxury bathrooms of Rome is placed in those times. Decorated with marble, gold, and paintings on the ceiling makes this bathroom a designated place for the pope’s use.

5.3 THIRD LEVEL

5.3.1 GIRETTO SCOPERTO OR ALEXANDER VII WALKWAY. (A)

It is a circular corridor built in the mid-seventeenth century by Alexander VII Chigi: the pope delimited by having an open wall with a series of arches made and built on top of a previous ledge, partially similar to what Pius iV had done a century earlier on the opposite side of the building.

Looking out from one of the openings, you have a magnificent view of Rome and the Vatican. So, on the left you can see the Santo Spirito complex, built by Sixtus IV of Rovere as a public hospital around 1480- at the same time as the Sistine Chapel- and behind it, the Janiculum Hill; in the middle is St. Peter’s Basilica dominated by Michelangelo’s dome, Gian Lorenzo Bernini’s colonnade and via della Conciliazione, designed in the fascist period; The Vatican palaces are on the right.

Third level

5.3.2 THE UPPER ARMOURY (B):

These are four adjoining rooms that house the most significant part of the impressive collection of weapons and armor at Castel Sant’Angelo that includes more than six thousand pieces. The origin of this collection dates back to 1925 when Castel became a national museum and was chosen to house not only works of art but also military memorabilia.

In the first room, there is a section devoted to the Risorgimento or the movement that led to the independence and unity of Italy: here we find the uniform of Senator Francesco Sturbinetti, commander of the Republican state founded in 1849 following a revolt in the Papal States.

5.3.3 THE PERSEUS CHAMBER (C)

This is the Paul III’s studio, one of the private rooms in the apartment built in the 1540s. The name comes from the subject in the frieze painting, made between 1545 and 1546 by Perin del Vaga and his collaborators. The paintings illustrate precisely Perseus’ ventures, as the Latin poet Ovid recounts in his Metamorphosis. Perseus is the mythical hero who defeated the Gorgon Medusa, the monster that turned anyone who looked into his eyes to stone and freed the young Andromeda from a sea monster.

Its stories, therefore, celebrate the virtues of Paul III but also express confidence in the prevailing intellect over irrational forces: this is why a reference has been noted to action taken by the pope against the Lutheran Reformation. The room houses a part of the collections of paintings and furnishings belonging to the museum.

5.3.4 CUPID AND PSYCHE (D)

It was the bedroom in the apartment built by Pope Paul III in the 1540s. The name comes from the subject in the painted frieze, produced between 1545 and 1546 by Perin del Vaga and his assistants; indeed, it depicts the story of Cupid and Psyche, as Apuleius recounts in the Golden Ass, Cupid, sent by his mother Venus to punish Psyche, decides instead to marry her, attempt to look him in the face to discover his identity Psyche breaks the promise undergo a series of tests inflicted by the gods.

The Tale was selected for the pope’s room because during the Renaissance it was interpreted from a Christian perspective: Psyche is the personification of the soul and the tests she underwent represent the path to spiritual elevations towards salvation.

5.4 FOURTH LEVEL

5.4.1 THE TREASURE ROOM (A)

Here was Hadrian's real burial chamber. This is where we can find the emperor's sarcophagus in porphyry of which only the cover has survived to the current day: it was identified in the baptismal font at St.Peter’s Basilica.

Originally, this room formed a single space with the upper one, the so-called Sala Rotonda, and so was much higher. The current division dates back to the Middle Ages, in the middle of the sixteenth century, Paul III had the room filled with walnut cabinets to house the Papal States’ archives as well as the Secret Archive this is how it assumed as current day polygonal shape.

Fourth level
The treasure room

5.4.2 THE LIBRARY (B)

The main room is the library in one of the two apartments that Paul III had built in the 1540s; to be exact, the castellan’s apartment, or governor of the Castel Sant’Angelo, which also included the two adjoining rooms, the Sala dell’Adrianeo, and the Sala dei Festoni. This room provided access to the papal archives and this is why it became known as the Library in the eighteenth century.

5.5 FIFTH LEVEL

5.5.1 THE FIRST ROOM (A)

It was to house the banners, That is, military insignia, of assault units, such as the Arditi, whose role during the First world war has been to break the established fronts.

Fifth level

5.5.2 THE SECOND ROOM (B)

This was intended for the cavalry banners This is why the decoration has painted flags and horse heads in stucco.

In both rooms, Cambellotti was capable of watering down any possible rhetoric with the use of decorative wisdom based on famous lines and bright colors in clear Art Deco mold.

5.5.3 THE CENTRAL ROOM (C)

Originally built as one large with the Treasure Room below. It was created in the Middle Ages by dividing the height of the central tower of Hadrian’s Mausoleum.

Traditionally the room was associated with being the site of the first chapel dedicated to the Archangel Michael in the castle. At the turn of the sixteenth and seventeenth century, the room was to also used to house the extension of the secret archive: access was closed by an ironclad door and the walls were covered with carved wooden cupboards, adorned with studs, hinges and metal locks, now lost.

The ceiling of the central room

5.6 THE ROOF

5.6.1 THE TERRACE OF THE ANGEL,

It forms the highest accessible point of the castle, whose name is linked to the colossal statue of the Archangel Michael by Peter Anton van Verschaffelt who dominates it from the superior Maschietto. Next to the statue is the Bell of Mercy. The view opens almost to 360 degrees on the center of historic Rome, which lies at the foot of the castle, beyond the Tiber. Turning towards the Basilica of St. Peter it is possible to appreciate the route of the Passetto di Borgo, which connects Castel Sant'Angelo to the Vatican Palaces. In the past, it was also known as Terrazzo delle Corazze, because of the four stucco sculptures representing as many trophies, placed on the front parapet. It has long been the scene of the "fireworks of joy", or "Girandole"(as defined by Michelangelo), known throughout Europe since the end of the fifteenth century. The fireworks, which were admired and immortalized by many artists and travelers, were held on the top of the castle on the occasion of papal elections and religious celebrations or towns, such as June 29, the feast of Saints Peter and Paul, patrons of Rome.

Top level

5.6.2 THE STATUE OF SANT’ANGELO

This statue is placed on the top of the castle and it's this masterpiece, that gave the name to the actual building. In 590 a great plague epidemic struck Rome. Pope Gregory would have seen the archangel Michael sheath his sword on the top of the castle, thus signifying the end of the epidemic. The angel was erected on the top of the castle to commemorate the event. But as it has been changed many times the current statue is a special one. In 1746 Pope Benedict XIV Lambertini announced a competition to equip Castel Sant'Angelo with a new statue of the Angel on the occasion of the Jubilee of 1750. The winner was the Flemish Peter Anton Verschaffelt, who trained in Paris at the workshop of the sculptor Edmé Bouchardon and distinguished in Rome as the Pope's portraitist. Difficulties dictated by a large amount of metal required that the statue, fused in Civitavecchia by Francesco Giardoni, was inaugurated on the top of Castello only on 28 June 1752. Originally it was covered with a golden surface, except for the armor, which was covered with silver sheets. The angel, composed of 35 pieces, was made with the technique of fusion called "good shape", a variant of the "lost wax".

It is supported thanks to an internal frame, composed of two main pins crossed between them: the original one, replaced in 1986 with a stainless steel and titanium, is now exhibited in the Sala della Rotonda.

Current statue of Sant Angelo

5.7 THE FORTRESS

5.7.1 THE BASTION OF SAN MARCO

One of the four bastions built during the fifteenth century to complete the transformation of Hadrian’s mausoleum into an unassailable fortress, which had already begun under emperor Aurelian and continued throughout the Middle Ages.

The castle

5.7.2 PASSETTO DI BORGO

A walkway of about 1.200 meters up towards the Vatican palaces. Started at the end of the thirteenth century, the Passetto allowed the pope to escape to Castle in the event of danger: this is exactly what Clement VII did in 1527 to escape the Landsknecht or mercenaries in the pay of Emperor Charles V who was ravaging Rome at that time.

5.7.3 Bastion of San Giovanni

Home to the reconstruction of a sixteenth-century gunsmith workshop in the tower. Carrying on along the Marcia Ronda, we can see how Hadrian’s Mausoleum definitively became a fortress. The endeavor is the work of Boniface IX, elected pope in 1389 at the tender age of thirty-three. Boniface isolated the square-based cylinder of the mausoleum with a corridor: this way he created an isolated tower, surrounded by a moat, and subsequently much more difficult to attack. This was not all. The pope sealed off and used earth to fill in the original entrance to the mausoleum; he opened a second, raised entrance, accessible only by a drawbridge. Any enemy who managed to overcome the wall found themselves faced with the moat and bridge. Just the way we are now. Let's leave the external route around the walls, go across the bridge, and enter the cylinder.

These two rooms, built in the mid-eighteenth century to house the papal archives, were pinpointed in 1925 to house the Italian army’s memorabilia. Already in 1926, Cambellotti was called on to decorate the vaults with paintings and stucco work inspired by their content.

5.7.4 THE BASTION OF SAN LUCA

This was built like the others in the fifteenth century and then transformed in the course of the following centuries. Looking out from here you can see the profile of the pentagon city walls erected during the second half of the sixteenth century by Pope Pius IV and the park laid out on the inside during the1930s.

Continuing along the Matic Ronda, to the left, stands the Palace of Justice, now home to the Supreme Court of Appeal, built between the late nineteenth and early twentieth century, and which the locals refer to with the derogative title of “the palazzaccio” (the bad palace). By looking right, in one full glance, we have an opportunity to appreciate all the transformations that Castel Sant’angelo has undergone. Carrying on from the bottom, we encounter the cylinder of Hadrian’s Mausoleum; the structure of the fortress, with the lot of arms, almost canceled out by Alexander VI, the Borgia pope, and then the walls of the papal residence;: indeed, during the Renaissance period, the popes endowed Castel Sant'Angelo with apartments fitted with every kind of home comfort.

6. CONCLUSION

Castel Sant'Angelo is a very complex building from the Roman empire. Built by the Roman emperor Hadrian in 123 AD is started out as a mausoleum. After it served its purpose as a tomb, it was converted for military purposes. This led to the addition of a square wall surrounding the originally circular construction. It then went on from hide-out for the popes, when under threat, to its final destination as a museum. A famous and characteristical feature is formed by the Ponte Sant’Angelo, which was decorated much later by Bernini. Due to its ever-changing use, and additions it is one of the major architectural treasures of the world.

Bibliography

Througheternity,(2018).Througheternity.com https://www.througheternity.com/en/blog/history/the-mysteries-of-castel-santangelo.html

Chronology,(2018).Chronology.com https://chronologyofarchitecture.wordpress.com/2016/05/08/139-ce-castel-santangelo/

Pixshark(2018).pixshark.com https://pixshark.com/mausoleum-of-hadrian-plan.htm

Pinterest,(2018).pinterest. https://www.pinterest.es/pin/38702878022188077/

Altmarius,(2018).altmarius.ning.com https://altmarius.ning.com/profiles/blogs/castel-sant-angelo-e-il-bagno-di-papa-clemente-vii

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Hadrian's mausoleum
Hadrian's mausoleum
Section of Hadrians Mausoleum
Section
Primitive Hadrian's mausoleum
Primitive Hadrian's mausoleum
Passetto di Borgio
Passetto di Borgio
Paul III room and furniture Hadrians Mausoleum
Paul III room and furniture
First level Hadrians Mausoleum
First level
Second level Hadrians Mausoleum
Second level
Thrid level Hadrians Mausoleum
Thrid level
Fourth level Hadrians Mausoleum
Fourth level
The treasure room Hadrians Mausoleum
The treasure room
Fifth level Hadrians Mausoleum
Fifth level
The ceiling of the central room Hadrians Mausoleum
The ceiling of the central room
The roof of Hadrians Mausoleum
The roof
Current statue of Sant Angelo
Current statue of Sant Angelo
Fortress Hadrians Mausoleum
Fortress