Wat Ratchanatdaram (Thai: วัดราชนัดดาราม or Wat Ratchanatda School; IPA: [wát râːt.tɕʰa.nát.daːraːm]) 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 (Rama III) for the princess granddaughter, Somanass Waddhanawathy (พระเจ้าหลานเธอ พระองค์เจ้าโสมนัสวัฒนาวดี) in 1846.