Work of August Font i Carreras, it was destined to artistic exhibitions, concerts and cultural events. The building had a rectangular floor plan and was 91 x 50 meters. The iron structure allowed to cover a great assembly hall. It had exposed hand towers, with domes at the corners. On the second floor, there were different rooms, around the large one, with zenithal light, which allowed events and exhibitions to take place. The building basically consisted of a large hall, the '''Queen Regent's Hall''', with an area of , intended for public events. A publication of the beginning of the 20th century describes it: : "Es uno de los salones más vastos y elegantes que nuestra ciudad encierra, y responde admirablemente al objeto con que fue construido, que no es otro que el de celebrar en él grandes fiestas artísticas, musicales, literarias y de todos los géneros que se ofrezcan. Bien proporcionado, decorado con singular acierto, sin adornos superfluos ni mezquindades ridículas, a la primera impresión se le juzga favorablemente y tras un rato de contemplación se le admira sin restricciones". It was decorated with sculptures and paintings by the best artists of the time ( Eduard Batiste Alentorn,
Mariano Benlliure,
Modest Urgell, etc. ). The Hercules fountain, built in 1797, remained in its gardens until it was moved in 1928. After the exhibition, it remained open until 1938 (during the bombing of the Italian
Legionary Air Force in March 1938 a bomb fell on it in the middle of the Central Hall). It was demolished during the summer of 1942, arguing its poor condition, and used to sell the iron of the structure. Possibly it had to do with the fact that the palace was seen as a building that, due to the events that had taken place, had a great Catalanist significance. == Use as a room of acts ==