In the Portuguese city of Porto, there is a neoclassical structure called the Palacio da Bolsa.

As the administrative centre for the Commercial Association of Porto, it was started in 1842 by the architect Joaquim da Costa Lima and is situated on Rua Ferreira Borges next to the Church of San Francisco (So Francisco), the city's historic centre, which along with other monuments is listed by UNESCO as a World Heritage Site.

The impressive Arabian Hall, designed by Gonçalves de Sousa and modelled after the Alhambra Palace in Granada, Spain, and whose construction started in 1862, stands out. Its elaborate design is made even more appealing by the lighting, which creates lovely colour hues. The Patio das Naçes (Patio of Nations), the Presidential Hall (Sala do Presidente), the Library, which has more than 10,000 books, the sculptures by Soares dos Reis and Teixeira Lopes, and the paintings by Antonio Ramalho, Veloso Salgado, António Carneiro, and Henrique Medina are also present. It serves as the Chamber of Commerce and Industry of Porto's headquarters.

It has hosted many events and activities and acted as a reception for outstanding leaders. More than 200,000 tourists visit it each year, making it one of the city's most significant architectural landmarks. It has the designation of National Monument.

It has a variety of distinctive areas, but the following stand out:

Dedicated to honouring all previous leaders of the organisation, the gallery of former presidents is a place.

The ceiling in the library, which was painted by António Carneiro and features the image of Echo, Messenger of the Universal Language, is noteworthy but not public.

Courtyard of the Nations: Tomás Soller's impressive dome is surrounded on all sides by 20 coats of arms of the nations with which Portugal had diplomatic and commercial contacts in the 19th century.

Noble Staircase: The staircase, designed by Gustavo Adolfpho Gonçalves e Sousa with extraordinary ornamental embellishments in granite, the two towering chandeliers, and the existing skylight give this room a unique aura.

Courtroom: The four enormous glasses and the panels with motifs relating to the room's previous use as well as the local economy are highlighted in this room's French Renaissance design.

The Sala de los Jurados was where the former Commercial Court jurors convened.

The antique telegraph of the Commercial Association of Oporto, which was used to communicate information on the commodities entering the Barra do Douro, is located in this room.

Gustave Eiffel's Cabinet: In Portugal, Gustave Eiffel created some of his most famous pieces in this space. The talent of Gustave Eiffel, who made his stamp on the city of Porto, is honoured in this space.

The President's Room features oil paintings by Marques de Oliveira from 1890, as well as a stunning floor carved from exotic woods with Brazilian and African roots and a marble fireplace created by Teixeira Lopes.

Sala Dorada: Some of the elements to notice include the furnishings, the stucco ceiling, and the floor.

Chamber of the General Assemblies: This room, with its large light in the centre, has a very odd detail; despite looking like wood, its walls are really made of plaster. This detail is the result of the excellent craftsmanship of the artisans who built it.

The Louis XVI-styled Room of the Paintings pays honour to the Braganza dynasty's final six kings. This memorial serves as a thank you to Dona Maria II for giving the Commercial Association of Oporto the ruins of the long-gone Convent of San Francisco, upon which the Palacio de la Bolsa was erected.

Arab Hall: According to legend, the Alhambra Palace must have served as inspiration for this hall's architect, Gustavo Adolfo Gonçalves de Sousa. The Arab Hall is Porto's most significant venue for official events.