This ancient palace of the Ayutthaya Dynasty is a good example of the significant historical architecture of the Lopburi period. The rectangular site covers approximately 7 hectares. The palace faces the town and the Lopburi River is behind it.

Monuments
1. The water tank
2. The Twelve Halls of Treausure 
3. The Reception Hall for foreign envoys 
4. The Phra Chao Hao Hall
5. The Elephant Stables
6. The Chanthara Phisan Throne Hall
7. Dusitsawan Thanya Mahaprasada Throne Hall
8. Suthasawan Throne Hall
9. Thim Dap
10. Phiman Mongkut Pavillion
11. Phra Pratiep Building

It is surrounded by brick walls with boundary stones, and consists of 7 forts and 11 big arch Gates. Walls and gates have small arches with niches for lamps, typical of architecture during the time of King Narai the Great. Phra Narai Ratchanivet was build by King Narai, the king who ruled Ayutthaya from 2199 to 2231 B.E.