The upper floor of the building accommodates four sections. These include the late Princess Mother's private area, a reception hall and kitchen, and the private quarters for the Princess Mother's daughter, Her Royal Highness the late Princess Galyani Vadhana and Thanpuying Tasanavalaya Sornsonggram, Princess Galyani Vadhana's only daughter. The highlight of the Royal Villa is on the ceiling of the main hall. It has hand-crafted wood inlay of the Princess Mother's favourite constellations. Designed by the Astronomy Society of Thailand, installed light bulbs representing the stars in the centre of the ceiling showed the position of the constellations on October 21, 1900, the day the Princess Mother was born.
The Princess Mothe