This riverside gallery used to be the palace of Prince Sathittamrongsawas, the son of Pinklao, the second King of Siam in the reign of King Rama IV, and, years later, the residence of Mario Tamagno, the Italian architect behind iconic Bangkok landmarks such as the Ananta Samakhom Throne Hall and Hua Lumphong Railway Station. Petroleum Authority of Thailand funded the restoration to turn it into an art gallery that showcases pieces by renowned and emerging artists.