This elaborate interior is the **Antiguo Casino de Puerto Rico** in Old San Juan, a designated historical site, although its current use is the **Centro de Recepciones Oficiales del Gobierno** (Official Government Reception Center). Built between 1913 and 1917, the structure is a notable example of **Beaux-Arts architecture**, characterized by its classical symmetry, grand ornamentation, and lavish detailing, visible in the intricate plasterwork and Corinthian columns. The Antiguo Casino was originally a social club for wealthy Puerto Rican society. After falling into decline, it was restored by the Institute of Puerto Rican Culture and serves as a major venue for government events, balls, and large gatherings. The use of large marble-effect columns and multiple crystal chandeliers throughout the enormous main hall highlights its former role as a high-society meeting place and its current status as a significant governmental reception venue.