Bang Pa-in Palace It is an ancient palace from the Ayutthaya period. Built by King Prasat Thong. Because it is the place where His Majesty was born. Used as a place where His Majesty stayed. the King of Ayutthaya Because it is a palace near Phra Nakhon. During the reign of King Mongkut Thus began the restoration of the palace. During the reign of King Chulalongkorn, there was a major renovation. By building many royal palaces, palaces, and various palaces to serve as residences for receiving royal guests and giving royal banquets on various occasions.