Loha Prasat (Iron castle) at Wat Ratchanatdaram Worawihan temple in Bangkok, Thailand

Loha Prasat, which means iron castle or iron monastery is composed of five towers.
There were two other similar structures which previously existed in the world. Modelled after the earlier ones in India and Anuradhapura, Sri Lanka, both of which no longer exists. It contained 1,000 rooms with a golden spire on top. Another one, built in Sri Lanka, had nine floors and the roof was thatched with copper. Precious stones, wood and ivory decorated the walls. It was destroyed and remains of stone pillar from the past. Neither of these exist today.

The design of Loha Prasat almost appears Burmese, but in fact this is a copy of old Buddhist design found in Sri Lanka. In the early nineteenth century, it was begun construct by King Rama III.

Wat Ratchanatdaram is a buddhist temple (wat) located at the intersection between Ratchadamnoen Klang and Maha Chai Road, in Phra Nakhon district, Bangkok.