The Palau de Justícia de Barcelona was designed by the Catalan Spanish architect Enric Sagnier i Villavecchia. He was not as famous as Antoni Gaudi, Josep Puig I Cadafalch and Lluis Domenech, who were very renowned architects of their time, but he did author many buildings that have become famous landmarks today. His style was very versatile and comprised elements of the Neo-Baroque, Neo-Gothic and Modernista styles. Villavecchia was able to modify his style and design to accommodate the type of structure he was architecting. In Barcelona he has also designed the Caxia de Pensions building and the New Customs House, as well as the church located on the Tibidabo.
The Palau de Justícia in Barcelona was originally constructed to house the court of law, and featured neo-gothic style. The entrance has a highly decorated archway, which has engravings done around the arch. Enric Sagnier designed the building in collaboration with the architect Joseph Domenech I Estapisis and began work on the project in 1887. The structure was completed in 1888 and until 1910 had served its purpose as the house of law in Barcelona. The building is still in a good condition today.

The Palau de la Música Catalana (Palace of Catalan Music) is a concert hall designed in the Catalan modernista style by the architect Lluís Domènech i Montaner. It was built between 1905 and 1908 for the Orfeó Català, a choral society founded in 1891 that was a leading force in the Catalan cultural movement that came to be known as the Renaixença (Catalan Rebirth). It was inaugurated February 9, 1908. The design of the Palau is typical of Catalan modernism in that curves predominate over straight lines, dynamic shapes are preferred over static forms, and rich decoration that emphasizes floral and other organic motifs is used extensively. The concert hall of the Palau, which seats about 2,200 people, is the only auditorium in Europe that is illuminated during daylight hours entirely by natural light.

The Palau del Lloctinent was built in the early 1550s as a home to the Spanish Viceroy. It is now residence to Arxiu de la Corona d’Aragon. The fascinating thing about this place is all the history associated to it. Various documents, papers and other similar items from the twelfth century have been preserved here. Visitors can even see some of these documents featured in the exhibitions that often take place here.
The building has three distinct façades. The mastermind behind the designing of this structure was Antoni Carbonell who gave the building a Gothic Renaissance look that was typical during that era when it was built in 1557. It is one of the most spectacular buildings in the gothic district of the Catalan city of Barcelona today owing to its immense simplicity and grace. These qualities make the building impossible to miss. It includes heavy, intricate arches made of stone over the entrance. The stairs have a wooden roof over them setting a classic example of the architecture that was famous during the 16th century. There was a Sant Joridi sculpture in the building that was later replaced by a door near the staircase. The Palau organizes regular exhibitions of historic documents, relics and other objects based on the life of Jaume I for visitors to see. One can also find music concerts being held here often.

Constructed in the 13th century, Palau de Requesens is Barcelona's awe-inspiring heritage from the Middle Ages. In the 16th century the governor-general Galceran de Requesens used to live here. Since 1970, the building has hosted an institute promoting Catalan culture.

The Palau de la Generalitat is counted amongst the most historically rich places in Barcelona. As the name indicates, it is home to the offices of the Generalitat of Spain. It was originally built for the same purpose and even today acts as structure that houses governmental institutions. The building was built during the medieval era which makes it one of the very few structures in all of Europe from that time period.
Located in the Ciutat Vella district of the city, the original form of the building and its anterior façade was designed by Pere Blai in 1596. This façade faces the Placa de Sant Jaume and is unique in the fact that it is perhaps the only façade built based on this style in all of Barcelona. The first building to be purchased here was in the early fourteen hundreds after which various other houses were bought and amalgamated with the Palau.
The fact that the Palau currently holds the seat of Spain’s Government and Presidency of the Generalitat, makes it much more distinguished among all other buildings that are of the same era. It also has a lot of history associated to it which takes its grandeur to a higher level.

The Palau de la Virreina is located on the famous La Rambla in Barcelona. The palace was under construction from 1772 to 1775. The exact location of this destination is 99 La Rambla, close to the famous Boqueria Market. Initially constructed by Peru’s Viceroy, it was his residence with his wife until his demise, after which his widow lived here alone. It is because of the occupation of this residence by his widow that the Palau de la Virreina is now famously known as the Palace of the Viceroy’s wife.

Today, however, the palace is the property of Barcelona. Some part of it is open for visitors where exhibitions associated to art and culture are organized often.

The structure has distinct features of Baroque’s style of architecture. It is now being used by Barcelona’s cultural department. On the first floor, contemporary art exhibitions are organized by the department, whereas the ground floor gallery displays contemporary photography exhibitions and is named after a famous local photographer, Xavier Maserachs. This gallery also plays host to one of Barcelona’s most prestigious and most anticipated photography competitions held annually and known as the FotoMerce. This competition is held every year in September during Merce.

The Palau Guell is a town mansion (translated literally a "palace") in Barcelona, Catalonia, Spain designed by the Catalan architect Antoni Gaudi for the Catalan industrial tycoon Eusebi Guell. It is part of the UNESCO World Heritage Site "Works of Antoni Gaudi". The home is centered on a main room for entertaining high society guests. Guests entered the home in horse drawn carriages through the front iron gates, which featured a parabolic arch and intricate patterns of forged iron-work resembling seaweed and in some parts a horsewhip. Animals could be taken down a ramp and kept in the livery stable in the basement where the servants resided, while the guests went up the stairs to the receiving room. The ornate walls and ceilings of the receiving room disguised small viewing windows high on the walls where the owners of the home could view their guests from the upper floor and get a 'sneak peak' before greeting them, in case they needed to adjust their attire accordingly.