From the balcony of this first floor room, presided by a portrait of Alfons XIII by Ricard Canals, the same King who had inaugurated the International Exposition of 1929. For this reason it was the most richly decorated room of the whole Palau Nacional.

The ornamentation of the vaults was overseen by Jaume Llongueras (catalan). The four lunettes, of which two remain, are the work of Josep Obiols (spanish), with the cardinal virtues: Prudence, Justice, Fortitude and Temperance.

At the two ends of the Room, Francesc Labarta (spanish) painted the panel that represented the Universal Exposition of Barcelona of 1888, in which the Palau de Belles Arts can be seen, and Xavier Nogués (spanish) was the author of the panel that symbolised the International Exposition of 1929, in which you can see a silhouette of the Palau Nacional and of the Sagrada Família, under construction.

Over the entrance door of the Throne Room, it is worth noting a sculpture and a bronze frieze, by J. Claret (spanish).

During the remodelling in the building in 1990, all of this setting, aimed at royal pomp, underwent a total transformation turning it into the current Òleum Restaurant, with an exceptional view of Barcelona.