Two great architects worked on this palace: Domenech Estapà and Enric Sagnier. Each of them added something new to the construction that combines two different styles. The building's facade features eight domes and ornamentation.

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 Gothic building, located at number 373 on Avenida Diagonal, was constructed in 1550s by Antoni Carbonell. Nowadays it houses the archive of the Crown of Aragon. The palace is not open to visitors but is definitely worth seeing from the outside.

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 houses the offices of the Presidency of the Generalitat de Catalunya. It is one of the few buildings of medieval origin in Europe that still functions as a seat of government and houses the institution that originally built it. It is located in the Gothic Quarter of Catalonia's capital, the city of Barcelona. The Palau de la Generalitat is one of the Catalan nationality's most valued symbols, among other reasons because it has managed to survive so many historical and political disasters. Also, it has come to represent, along with the Palau del Parlament, a bastion of democracy in Catalonia One hundred and twenty-seven Presidents have governed from this house, from Berenguer de Cruïlles (1359) to the current President, José Montilla.

Palau de la Virreina was built by Josep Ribes in a Baroque style. Nowadays, the palace accommodates the Town Hall Department of Culture. Exhibitions are often held here displaying photographs, paintings and historical items.

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.