[1] This was opened to the public as the first museum in Thailand located underground on 27 November 2020, free of charge.

[2] Sanam Chai station is in the middle of Rattanakosin Island, or Bangkok's old town zone, which is a conservation area and has historical significance.

The interior is finished under the theme of the early Rattanakosin era, as designed by expert in Thai architecture and national artist Pinyo Suwankiri.

The ceiling painted with star sharpe stencils to resemble the atmosphere of the throne hall in Rattanakosin era.

without a roof and with specially designed escalators, in order to not obscure the view of Museum Siam located behind the exit.