The National Museum, located on the opposite side of Sanam Luang to The Grand Palace, was established in 1887 by King Rama V. The foundation collection was previously stored at The Grand Palace. The original building was formerly the palace of a vice-ruler.

King Rama VII placed it under the administration of the Royal Institute of Literature, Archeology and Fine Arts which has evolved to be the Fine Arts Department.

New buildings were constructed in 1967 and other historical buildings relocated to the museum grounds.

The Buddhaisawan Chapel was built in 1787 to enshrine a revered northern Buddha image called Phra Buddha Si Hing. The interior has exceptional murals, while the building itself is a fine example of Rattanakosin religious architecture.

Tamnak Daeng is another building that has been moved to the Museum. This "Red House" was originally the residence of an elder sister of King Rama I. Furniture and other items from early Bangkok times.

The National Museum' collection encompasses a wide range of religious and secular art found throughout the country. Items from pre-historic times, through the Srivijaya, Dvaravati, Khmer Kingdoms and the Sukhothai, Ayutthaya and Rattanakosin periods of Thai history.