VIMANMEK MANSION

The Vimanmek Palace officially named Vimanmek Mansion, is a former royal palace in Bangkok, Thailand. It is also known as the Vimanmek Teak Mansion or Vimanmek Mansion. It is located in the Dusit Palace complex.

My researched on the Mansion's (mostly in wikipedia and the guidebook sent to me before my flight) states that:
In 1982 Queen Sirikit asked permission of King Rama IX to renovate Vimanmek Palace for use as a museum to commemorate King Rama V by displaying his photographs, personal art and handicrafts, and to serve as a showcase of the Thai national heritage. 

The palace is now a major tourist attraction and is the world's largest golden teakwood mansion. Many of the gifts and treasures that King Chulalongkorn collected on his European trip are now displayed in the museum.

Visitors to the palace should be aware that "appropriate address" is required for entry. This means a collared shirt (short-sleeves are OK) and trousers - no shorts, ripped jeans or T-shirts. Appropriate attire (a sarong basically) can be purchased if need be when you get there. All cameras and phones must be left in lockers (you will pass through a scanner on the way in) and shoes must be removed also. There is a fee for the lockers.

The Mansion tends to be crowded, so better be there early.

the almost crowdless mansion