Reflecting the Princess Mother's deep interest in astronomy, the ceiling in the reception hall is carved in the image of the solar system, with clusters of the different star signs. It has a handcrafted wood inlay of the Princess Mother's favourite constellations. Designed by the Astronomy Society of Thailand, light bulbs installed in the ceiling representing stars showed the position of the constellations on 21 October 1900, the day the Princess Mother was born. Walls are lined with Thai silk embroidered with flowers. Other decorative items are carvings of elephant herds in the forest, while the Thai alphabet lines the stairway to the lower level.