It also served as the residence of the alcalde-mayor, presidente municipal, or governor, who held the highest authority as the Spanish official in Iloilo during the period.

In 2022, the National Museum of the Philippines declared Casa Real de Iloilo, together with the Arroyo Fountain, an Important Cultural Property (ICP).

[2] The Casa Real de Iloilo was originally a one-story stone building where the provincial government offices were located after its completion in 1869.

"[3] On April 11, 1901, the U.S. Philippine Commission headed by William Howard Taft inaugurated the civil government of Iloilo and inducted Gen. Martin T. Delgado as the first provincial governor at the Casa Real.

[4] Casa Real de Iloilo now mostly serves as a venue for private parties, government functions, and cultural events.