Wat Ratchanatdaram is a Buddhist temple (wat) located at the intersection between Ratchadamnoen Klang and Maha Chai Road, in Phra Nakhon district, Bangkok. Meaning Temple of the Royal Niece, the temple was built to the order of King Nangklao for his granddaughter, Princess Somanass Waddhanawathy in 1846. It is popularly known as Loha Prasat, literally meaning the iron palace.