Wat Ratchanatdaram (Thai: วัดราชนัดดาราม, pronounced [wát râːt.t͡ɕʰā.nát.dāːrāːm]) is a Buddhist temple (wat) located at the intersection between Ratchadamnoen Klang and Maha Chai Road, in Phra Nakhon district, Bangkok.

A pyramid like structure created by the outer building is the widest, The next one smaller than the previous.

The Loha Prasat at Wat Ratchanatdaram is based on an old Buddhist design and is modelled after two earlier similar structures in Shravasti, India and Anuradhapura, Sri Lanka, both of which no longer exist.

The Indian Loha Prasat contained 1,000 rooms with a golden spire on top.

The Sri Lankan Loha Prasat had nine floors and the roof was thatched with copper.