The Iloilo Provincial Jail has undergone a multi-million makeover and will now serve as a museum.
The provincial government spent P20 million for retrofitting while the National Museum of the Philippines funded the restoration of P80 million.
The jail was built in 1911 and was a prominent landmark in the province during the World War II.
It will now serve as a regional museum and will house regional artifacts.
It has 5 galleries in the lower ground area and an open gallery on the second floor.
The national museum said it will bring back to Iloilo "the golden mask of Oton" that was excavated in the town of Oton during 1960s.
Fossils believed to be of elephants excavated in the town of Cabatuan will also be brought here from the national archive.