The Real Casino Antiguo of Castellón de la Plana was founded in 1814, which makes it the oldest institution of its kind in the Iberian Peninsula. Its origins lie in the context of the approval of a new decree that encouraged the creation of spaces for civic sociability after the War of Independence.

The building occupies a large plot with frontages onto the Plaza de la Puerta del Sol and the Calle Enmedio, in the heart of Castellón. It is the result of the transformation of an eighteenth-century property known as the Palacio de los Tirado. The present building is the outcome of a competition convened by the Castellón City Council. In 1876 the institution moved permanently to this site, historically known as the "Casino Antic".

From an architectural standpoint, the building has something of the air of a stately home, with a façade overlooking one of the most representative urban spaces in the historic centre of Castellón, known as the "Puerta del Sol". The building has undergone various reforms throughout the nineteenth and twentieth centuries to adapt it to its social and cultural functions.

Today, the Real Casino Antiguo operates as a socio-cultural entity integrated into the Federació d'Entitats Culturals de la Comunitat Valenciana (FECCC). Throughout the year, its premises host meetings, concerts, lectures, banquets and leisure activities for both members and the general public.