In the middle of the Memorial Hall of the Royal Engineer and Royal Observatory Chaivorapongsa Memorial . That is a Phra Thong Thani , a gilded pagoda pagoda in Buddha style tiara decorated with painted tiles . A leaf, flower , ceilings and pillars inside the Buddha statue decorated with gold leaf , guava . Enshrined in the ancient church at King Mongkut was ordained to the city over time . The relics and enshrined Prasrimahabhodi from Bodh Gaya.