Phra Thinang Aisawan Thiphyasitting in the pond has become the "signature piece" of Bang Pa In. It is an elegant Thai-style pavilion in the middle of a pond with the title of "The divine seat of personal freedom." It is really the only example of classical Thai architecture within the palace and was built by King Chulalongkorn (Rama V). It now houses a statue of him.
Tevaraj-Kanlai Gate is the modern building which has a more "Paris Metro" art-deco feel to it is the main residence of the palace.
Bang Pa-In Royal Palace (also known as the Summer Palace) is a palace complex formerly used by the Thai kings. It lies beside the Chao Phraya River in Bang Pa-in District within Phra Nakhon Si Ayutthaya Province. Wikipedia Thailand