Boyl Palace is one of the most representative noble buildings of the district of Castello. It was erected in 1840 by Carlo Boyl Pilo, Marquis of Putifigari.

The building was designed in the neoclassical style, along the lines of Porta Cristina and of the Royal military arsenal's main entrance, these also designed by the Marquis of Putifigari.

The building consists of a marble parapet adorned by four statues representing the Seasons, in the central part the gentle coat of arms of the House is carved. Below the inscription that reminds the year when the building was erected: "COMES KAROLUS PILO BOYL EX MARCHIO PUTIFIGARI INSTAURAVIT ANNO MDCCCXL".

A Pisan tower, which served as access to Castello district and was contemporary with those of San Pancrazio and Elephant, was absorbed by the building. The tower suffered three devastating attacks: the British in 1708, the Spanish siege of 1717, when it lost its upper part and the French attack in 1793. Three cannonballs stuck on the façade of the building are a vivid testimony of the three attacks suffered. Beyond the gate, on the left side, you can see a Roman funeral stele, which had been walled up in the tower along with other inscriptions. At the end of the nineteenth century, the palace was acquired by the Barons Rossi's family. The current owners are the Earls from Marche, Tomassini Barbarossa.

The building is located along Viale Trieste on the corner of Via XXIX Novembre. It was planned by Riccardo Simonetti, and made definitely in 1921.

The combination of Liberty elements with the Renaissance’s style, the refinement and the attention to details make this palace a unique work. The corner of the building is particularly remarkable, by superimposing the bow window on each floor. The two façades show openings and balconies which are totally different in the three floors, but they are all richly decorated with an ornament that combines concrete, iron and terracotta.

The building dating back to the second half of the nineteenth century, rises in an area which includes Piazza Santa croce, Via Corte d'Appello and Via Santa Croce.

The main façade, in Neoclassical style, overlooks the Bastion of Santa Croce and develops into four floors. The second and third floors show windows decorated with blind gables and wide cornices, and balconies with wrought iron railings; in deep contrast to the previous ones, the windows on the first and fourth floors appear austere and unadorned. A marble headstone, dating back 1630 and placed at the entrance of the first floor, recalls the existence of a fountain located at Piazza Santa Croce, later incorporated into the building. The Azara palace during the years following its construction was used both as a municipal seat and as a museum, to keep the paintings from the church of Santa Teresa and from the disappeared church of San Francesco.

The building is located at Via Canelles in the historic district of Castello. Built during the Middle Ages, it has undergone several renovations until reaching its present appearance in the Art Nouveau style.

It has two floors, in addition to the ground floor, characterized by partition cornices and six paired windows on each floor. On the ground floor of the main façade we find the particular smooth rustication, typical of the buildings designed by Gaetano Cima. Each opening with a balcony is adorned with graceful terracotta tiles and with elegant spiral mullions. The windows on the first floor, overlooking via Canelles and vico Lamarmora, are adorned with decorated cornices.

The entrance hall's stairwell is particularly interesting, with two symmetrical flights of stairs, with mullion handrails, leading to a landing from which a secondary flight of stairs gives access to the apartments.

The building, erected in the second half of the eighteenth century is located at Via Lamarmora, overlooking the Piazza Carlo Alberto.

Following the bombings of 1943 the building was severely damaged and, after the World War II, it was carefully restored. The building, built according to the taste of “Piedmontese Barocchetto”, is on two upper floors, a mezzanine floor and a ground floor. The windows are different according to the floor: those of the middle floor have balconies flush with the façade and are unadorned; the windows of the upper floors have protruding balconies and wrought iron railings. The main entrance is characterized by Doric pillars and it's dominated by a triangular gable in which the gentle shield of the owners (Nin of St. Thomas) is carved.

The building, is home and residence of the Archbishop of Cagliari from the XII century.

It is situated in an area of Castello district, where also other typical buildings of Cagliari's history (the Cathedral, the Royal Palace, the former Town Hall) are located. Carlo Felice lived there during the Napoleonic period, because of the inadequacy of the Royal Palace. The current appearance of the main façade is due to significant reconstruction works, which took place at the end of the third decade of the last century. On the side wall funerary inscriptions are visible, dating back to the first Christian era. In the inner rooms numerous paintings and archaeological finds are kept; you can also see part of the original structure of the Cathedral, in Romanesque style.

The building is located in Via Lamarmora between La Purissima Church and the former headquarters of the Archaeological Museum. Made in the eighteenth century it was owned by Masones family.

In the nineteenth century, two  important events changed the history of this building: the Marquis Fancesco Amat purchased the palace, modernising and expanding it. The building has two facades: one gives onto Via Lamarmora and the other on Piazza Indipendenza. The facade on Via Lamarmora spread over two floors with a succession of wrought iron balconies. The main entrance leads to a large hall whose ceiling is decorated with the coat of arms of the Amat family.

The building planned by the engineer Dionigi Scano stands on the corner of Largo Carlo Felice and Via Crispi located adjacent to the rear front of the City Hall.

Its construction took place between 1899 and 1901. Among the distinctive elements the vaults that form the openings of the ground floor, lined up to the windows of the three upper floors, each one richly decorated with balconies partially protruding and partly in line with the facade. The two fronts are marked by vertical pillars banded with Ionic capitals. Definitely adorned is the decorative band which is positioned below the projecting ledge, decorated with dents and female figures. It is of particular importance the use of different materials such as stone, concrete and brick during the construction works.

The project was realized in 1933 after some changes regarding the exterior decoration. This building is the first work of private construction industry made entirely of reinforced concrete in Cagliari. The building blends perfectly the modern styles with Art Deco. In the spotlight, a concrete slab placed above the entrance portraying animals during an epic race. At the top of the building there are three long arches that surround the windows with balustrades embellished with nautical motives and four vessels, leaning against the ledge that circumscribes the first floor.

The building, which takes the name of its designer and owner, the engineer Gaetano Lixi Delogu, is renowned for the exterior decoration made by Francesco Ciusa, faithfully renovated in the post-war period after being damaged by bombing in 1943. The construction works began in 1932, and ended after a year. Clearly visible throughout the building is the use of colour, cleverly combining painting and pink stone. Francesco Ciusa actively contributed to the work, taking care of design, refinements and exterior decorations. Among his works we remember the pink plaster, and low-reliefs reproducing caravels and fountains, particularly refined. The most significant decoration is the head of Gorgon Rondanini made during the reconstruction of the parts destroyed by the bombing in 1943.